diff --git a/.readthedocs.yaml b/.readthedocs.yaml
deleted file mode 100644
index 8024dbf..0000000
--- a/.readthedocs.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-# .readthedocs.yaml
-# Read the Docs configuration file
-# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
-# Required
-version: 2
-
-# Set the OS, Python version and other tools you might need
-build:
-  os: ubuntu-22.04
-  tools:
-    python: "3.12"
-    # You can also specify other tool versions:
-    # nodejs: "19"
-    # rust: "1.64"
-    # golang: "1.19"
-
-# Build documentation in the "docs/" directory with Sphinx
-sphinx:
-  configuration: docs/conf.py
-
-# Optionally build your docs in additional formats such as PDF and ePub
-# formats:
-#    - pdf
-#    - epub
-
-# Optional but recommended, declare the Python requirements required
-# to build your documentation
-# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
-python:
-  install:
-  - requirements: docs/requirements.txt
\ No newline at end of file
diff --git a/docs/Makefile b/Makefile
similarity index 92%
rename from docs/Makefile
rename to Makefile
index d4bb2cb..d0c3cbf 100644
--- a/docs/Makefile
+++ b/Makefile
@@ -5,8 +5,8 @@
 # from the environment for the first two.
 SPHINXOPTS    ?=
 SPHINXBUILD   ?= sphinx-build
-SOURCEDIR     = .
-BUILDDIR      = _build
+SOURCEDIR     = source
+BUILDDIR      = build
 
 # Put it first so that "make" without argument is like "make help".
 help:
diff --git a/docs/_build/html/.buildinfo b/doc/.buildinfo
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rename to doc/.buildinfo
diff --git a/docs/_build/html/_sources/index.rst.txt b/doc/_sources/index.rst.txt
similarity index 71%
rename from docs/_build/html/_sources/index.rst.txt
rename to doc/_sources/index.rst.txt
index 11cfb0c..cc49de9 100644
--- a/docs/_build/html/_sources/index.rst.txt
+++ b/doc/_sources/index.rst.txt
@@ -13,7 +13,7 @@ Installation
 ============
 
 To install PyNeon, clone the PyNeon repository from
-https://github.com/NCCLabMPI/pyneon and run:
+https://github.com/NCCLabMPI/PyNeon and run:
 
 .. code-block:: bash
 
@@ -24,7 +24,9 @@ PyPI and conda releases are planned for the future.
 Data format
 ===========
 
-PyNeon works with the "Timeseries" data format as exported from Pupil Clouds. The data could be from a single recording or from a project with multiple recordings.
+PyNeon works with the "Timeseries Data" or "Timeseries Data + Scene Video" formats 
+as exported from Pupil Clouds. The data could be from a single recording or from a 
+project with multiple recordings.
 
 .. toctree::
    :maxdepth: 1
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diff --git a/docs/_build/html/_static/vendor/fontawesome/6.5.2/webfonts/fa-v4compatibility.woff2 b/doc/_static/vendor/fontawesome/6.5.2/webfonts/fa-v4compatibility.woff2
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rename from docs/_build/html/_static/vendor/fontawesome/6.5.2/webfonts/fa-v4compatibility.woff2
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diff --git a/docs/_build/html/_static/webpack-macros.html b/doc/_static/webpack-macros.html
similarity index 100%
rename from docs/_build/html/_static/webpack-macros.html
rename to doc/_static/webpack-macros.html
diff --git a/docs/_build/html/genindex.html b/doc/genindex.html
similarity index 100%
rename from docs/_build/html/genindex.html
rename to doc/genindex.html
diff --git a/docs/_build/html/index.html b/doc/index.html
similarity index 97%
rename from docs/_build/html/index.html
rename to doc/index.html
index 39e5b64..be0e260 100644
--- a/docs/_build/html/index.html
+++ b/doc/index.html
@@ -329,7 +329,7 @@
 <section id="installation">
 <h1>Installation<a class="headerlink" href="#installation" title="Link to this heading">#</a></h1>
 <p>To install PyNeon, clone the PyNeon repository from
-<a class="github reference external" href="https://github.com/NCCLabMPI/pyneon">NCCLabMPI/pyneon</a> and run:</p>
+<a class="github reference external" href="https://github.com/NCCLabMPI/PyNeon">NCCLabMPI/PyNeon</a> and run:</p>
 <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>pip<span class="w"> </span>install<span class="w"> </span>.
 </pre></div>
 </div>
@@ -337,7 +337,9 @@ <h1>Installation<a class="headerlink" href="#installation" title="Link to this h
 </section>
 <section id="data-format">
 <h1>Data format<a class="headerlink" href="#data-format" title="Link to this heading">#</a></h1>
-<p>PyNeon works with the “Timeseries” data format as exported from Pupil Clouds. The data could be from a single recording or from a project with multiple recordings.</p>
+<p>PyNeon works with the “Timeseries Data” or “Timeseries Data + Scene Video” formats
+as exported from Pupil Clouds. The data could be from a single recording or from a
+project with multiple recordings.</p>
 <div class="toctree-wrapper compound">
 </div>
 </section>
diff --git a/docs/_build/html/objects.inv b/doc/objects.inv
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diff --git a/docs/_build/html/reference/dataset.html b/doc/reference/dataset.html
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diff --git a/docs/_build/html/reference/index.html b/doc/reference/index.html
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rename to doc/reference/recording.html
index 45eb5a3..abc8098 100644
--- a/docs/_build/html/reference/recording.html
+++ b/doc/reference/recording.html
@@ -412,6 +412,12 @@ <h1>pyneon.NeonRecording<a class="headerlink" href="#pyneon-neonrecording" title
 <li><p><strong>resamp_other_kind</strong> (<em>str</em><em>, </em><em>optional</em>) – Resampling method for columns of other types, by default “nearest”.</p></li>
 </ul>
 </dd>
+<dt class="field-even">Returns<span class="colon">:</span></dt>
+<dd class="field-even"><p><strong>concat_data</strong> – Concatenated data.</p>
+</dd>
+<dt class="field-odd">Return type<span class="colon">:</span></dt>
+<dd class="field-odd"><p>pd.DataFrame</p>
+</dd>
 </dl>
 </dd></dl>
 
diff --git a/docs/_build/html/search.html b/doc/search.html
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new file mode 100644
index 0000000..8a8c483
--- /dev/null
+++ b/doc/searchindex.js
@@ -0,0 +1 @@
+Search.setIndex({"alltitles": {"Data format": [[0, "data-format"]], "Installation": [[0, "installation"]], "PyNeon API": [[2, null]], "PyNeon Tutorials": [[5, null]], "PyNeon documentation": [[0, null]], "pyneon.NeonDataset": [[1, null]], "pyneon.NeonRecording": [[4, null]], "pyneon.preprocess": [[3, null]]}, "docnames": ["index", "reference/dataset", "reference/index", "reference/preprocess", "reference/recording", "tutorials/index"], "envversion": {"sphinx": 63, "sphinx.domains.c": 3, "sphinx.domains.changeset": 1, "sphinx.domains.citation": 1, "sphinx.domains.cpp": 9, "sphinx.domains.index": 1, "sphinx.domains.javascript": 3, "sphinx.domains.math": 2, "sphinx.domains.python": 4, "sphinx.domains.rst": 2, "sphinx.domains.std": 2}, "filenames": ["index.rst", "reference\\dataset.rst", "reference\\index.rst", "reference\\preprocess.rst", "reference\\recording.rst", "tutorials\\index.rst"], "indexentries": {"concat_channels() (pyneon.neonrecording method)": [[4, "pyneon.NeonRecording.concat_channels", false]], "eye_states (pyneon.neonrecording property)": [[4, "pyneon.NeonRecording.eye_states", false]], "gaze (pyneon.neonrecording property)": [[4, "pyneon.NeonRecording.gaze", false]], "imu (pyneon.neonrecording property)": [[4, "pyneon.NeonRecording.imu", false]], "module": [[0, "module-pyneon", false]], "neonrecording (class in pyneon)": [[4, "pyneon.NeonRecording", false]], "pyneon": [[0, "module-pyneon", false]]}, "objects": {"": [[0, 0, 0, "-", "pyneon"]], "pyneon": [[1, 1, 1, "", "NeonDataset"], [4, 1, 1, "", "NeonRecording"], [3, 0, 0, "-", "preprocess"]], "pyneon.NeonRecording": [[4, 2, 1, "", "concat_channels"], [4, 3, 1, "", "eye_states"], [4, 3, 1, "", "gaze"], [4, 3, 1, "", "imu"]]}, "objnames": {"0": ["py", "module", "Python module"], "1": ["py", "class", "Python class"], "2": ["py", "method", "Python method"], "3": ["py", "property", "Python property"]}, "objtypes": {"0": "py:module", "1": "py:class", "2": "py:method", "3": "py:property"}, "terms": {"3d": 4, "3d_eye_st": 4, "It": 0, "The": 0, "These": 4, "To": 0, "access": 4, "aesthet": 0, "all": 4, "alreadi": 4, "ar": [0, 4], "attribut": 4, "bool": 4, "can": 4, "ch_name": 4, "channel": 4, "chu": 0, "class": [1, 2, 4], "clone": 0, "cloud": 0, "column": 4, "common": 4, "concat_channel": 4, "concat_data": 4, "concaten": 4, "conda": 0, "could": 0, "data": 4, "datafram": 4, "dataset_dir": 1, "default": 4, "detail": 4, "develop": 0, "downsampl": 4, "empir": 0, "export": 0, "ey": [0, 4], "eye_st": 4, "first": 4, "float": 4, "from": [0, 4], "function": 2, "futur": 0, "gabriel": 0, "gaze": 4, "hartel": 0, "i": [0, 2, 4], "imu": 4, "institut": 0, "interpol": 4, "jan": 0, "lab": 0, "lazili": 4, "librari": 0, "light": 0, "linear": 4, "list": 4, "load": 4, "max": 0, "mean": 4, "method": 4, "modal": [0, 4], "more": 4, "multi": 0, "multipl": [0, 1], "name": 4, "ncclabmpi": 0, "nearest": 4, "neon": 0, "neoneyest": 4, "neongaz": 4, "neonimu": 4, "object": [1, 4], "one": 4, "onli": 4, "option": 4, "origin": 0, "other": 4, "paramet": 4, "path": [1, 4], "pd": 4, "pip": 0, "plan": 0, "planck": 0, "preprocess": 4, "project": 0, "properti": 4, "pupil": 0, "pypi": 0, "qian": 0, "record": [0, 1, 4], "recording_dir": 4, "referencc": 2, "releas": 0, "repositori": 0, "requir": 4, "resamp_float_kind": 4, "resamp_other_kind": 4, "resampl": 4, "return": 4, "run": 0, "same": 4, "scene": 0, "see": 4, "signal": 4, "singl": [0, 4], "specif": 4, "state": 4, "str": [1, 4], "thi": [2, 4], "time": 4, "timeseri": 0, "timestamp": 4, "track": 0, "true": 4, "type": 4, "under": 4, "variou": 4, "video": 0, "weight": 0, "when": 4, "whether": 4, "work": 0}, "titles": ["PyNeon documentation", "pyneon.NeonDataset", "PyNeon API", "pyneon.preprocess", "pyneon.NeonRecording", "PyNeon Tutorials"], "titleterms": {"api": 2, "data": 0, "document": 0, "format": 0, "instal": 0, "neondataset": 1, "neonrecord": 4, "preprocess": 3, "pyneon": [0, 1, 2, 3, 4, 5], "tutori": 5}})
\ No newline at end of file
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Binary files a/docs/_build/doctrees/reference/preprocess.doctree and /dev/null differ
diff --git a/docs/_build/doctrees/reference/recording.doctree b/docs/_build/doctrees/reference/recording.doctree
deleted file mode 100644
index 4ad9910..0000000
Binary files a/docs/_build/doctrees/reference/recording.doctree and /dev/null differ
diff --git a/docs/_build/doctrees/tutorials/index.doctree b/docs/_build/doctrees/tutorials/index.doctree
deleted file mode 100644
index a2f453e..0000000
Binary files a/docs/_build/doctrees/tutorials/index.doctree and /dev/null differ
diff --git a/docs/_build/html/searchindex.js b/docs/_build/html/searchindex.js
deleted file mode 100644
index 2c1cb8c..0000000
--- a/docs/_build/html/searchindex.js
+++ /dev/null
@@ -1 +0,0 @@
-Search.setIndex({"alltitles": {"Data format": [[0, "data-format"]], "Installation": [[0, "installation"]], "PyNeon API": [[2, null]], "PyNeon Tutorials": [[5, null]], "PyNeon documentation": [[0, null]], "pyneon.NeonDataset": [[1, null]], "pyneon.NeonRecording": [[4, null]], "pyneon.preprocess": [[3, null]]}, "docnames": ["index", "reference/dataset", "reference/index", "reference/preprocess", "reference/recording", "tutorials/index"], "envversion": {"sphinx": 63, "sphinx.domains.c": 3, "sphinx.domains.changeset": 1, "sphinx.domains.citation": 1, "sphinx.domains.cpp": 9, "sphinx.domains.index": 1, "sphinx.domains.javascript": 3, "sphinx.domains.math": 2, "sphinx.domains.python": 4, "sphinx.domains.rst": 2, "sphinx.domains.std": 2}, "filenames": ["index.rst", "reference\\dataset.rst", "reference\\index.rst", "reference\\preprocess.rst", "reference\\recording.rst", "tutorials\\index.rst"], "indexentries": {"concat_channels() (pyneon.neonrecording method)": [[4, "pyneon.NeonRecording.concat_channels", false]], "eye_states (pyneon.neonrecording property)": [[4, "pyneon.NeonRecording.eye_states", false]], "gaze (pyneon.neonrecording property)": [[4, "pyneon.NeonRecording.gaze", false]], "imu (pyneon.neonrecording property)": [[4, "pyneon.NeonRecording.imu", false]], "module": [[0, "module-pyneon", false], [3, "module-pyneon.preprocess", false]], "neondataset (class in pyneon)": [[1, "pyneon.NeonDataset", false]], "neonrecording (class in pyneon)": [[4, "pyneon.NeonRecording", false]], "pyneon": [[0, "module-pyneon", false]], "pyneon.preprocess": [[3, "module-pyneon.preprocess", false]]}, "objects": {"": [[0, 0, 0, "-", "pyneon"]], "pyneon": [[1, 1, 1, "", "NeonDataset"], [4, 1, 1, "", "NeonRecording"], [3, 0, 0, "-", "preprocess"]], "pyneon.NeonRecording": [[4, 2, 1, "", "concat_channels"], [4, 3, 1, "", "eye_states"], [4, 3, 1, "", "gaze"], [4, 3, 1, "", "imu"]]}, "objnames": {"0": ["py", "module", "Python module"], "1": ["py", "class", "Python class"], "2": ["py", "method", "Python method"], "3": ["py", "property", "Python property"]}, "objtypes": {"0": "py:module", "1": "py:class", "2": "py:method", "3": "py:property"}, "terms": {"3d": 4, "3d_eye_st": 4, "It": 0, "The": 0, "These": 4, "To": 0, "access": 4, "aesthet": 0, "all": 4, "alreadi": 4, "ar": [0, 4], "associ": [], "attribut": 4, "bool": 4, "can": 4, "ch_name": 4, "channel": 4, "chu": 0, "class": [1, 2, 4], "clone": 0, "cloud": 0, "column": 4, "common": 4, "concat_channel": 4, "concaten": 4, "conda": 0, "could": 0, "data": 4, "datafram": 4, "dataset": [], "dataset_dir": 1, "default": 4, "detail": 4, "develop": 0, "downsampl": 4, "empir": 0, "export": 0, "ey": [0, 4], "eye_st": 4, "first": 4, "float": 4, "from": [0, 4], "function": 2, "futur": 0, "gabriel": 0, "gaze": 4, "hartel": 0, "holder": [], "i": [0, 2, 4], "imu": 4, "institut": 0, "interpol": 4, "jan": 0, "lab": 0, "lazili": 4, "librari": 0, "light": 0, "linear": 4, "list": 4, "load": 4, "max": 0, "mean": 4, "method": 4, "modal": [0, 4], "more": 4, "multi": 0, "multipl": [0, 1], "name": 4, "ncclabmpi": 0, "nearest": 4, "neon": 0, "neoneyest": 4, "neongaz": 4, "neonimu": 4, "non": [], "object": [1, 4], "one": 4, "onli": 4, "option": 4, "origin": 0, "other": 4, "paramet": 4, "path": [1, 4], "pd": 4, "pip": 0, "plan": 0, "planck": 0, "preprocess": 4, "project": 0, "properti": 4, "pupil": 0, "pyneon": [], "pypi": 0, "qian": 0, "record": [0, 1, 4], "recording_dir": 4, "referencc": 2, "releas": 0, "repositori": 0, "requir": 4, "resamp_float_kind": 4, "resamp_other_kind": 4, "resampl": 4, "return": 4, "run": 0, "same": 4, "see": 4, "signal": 4, "singl": [0, 4], "specif": 4, "state": 4, "str": [1, 4], "thi": [2, 4], "time": 4, "timeseri": 0, "timestamp": 4, "track": 0, "true": 4, "type": 4, "under": 4, "variou": 4, "weight": 0, "when": 4, "whether": 4, "work": 0}, "titles": ["PyNeon documentation", "pyneon.NeonDataset", "PyNeon API", "pyneon.preprocess", "pyneon.NeonRecording", "PyNeon Tutorials"], "titleterms": {"api": 2, "data": 0, "document": 0, "format": 0, "instal": 0, "neondataset": 1, "neonrecord": 4, "paramet": [], "preprocess": 3, "pyneon": [0, 1, 2, 3, 4, 5], "tutori": 5}})
\ No newline at end of file
diff --git a/docs/requirements.txt b/docs/requirements.txt
deleted file mode 100644
index 7274d5e..0000000
--- a/docs/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-sphinx
-pydata-sphinx-theme
\ No newline at end of file
diff --git a/docs/make.bat b/make.bat
similarity index 94%
rename from docs/make.bat
rename to make.bat
index 954237b..dc1312a 100644
--- a/docs/make.bat
+++ b/make.bat
@@ -7,8 +7,8 @@ REM Command file for Sphinx documentation
 if "%SPHINXBUILD%" == "" (
 	set SPHINXBUILD=sphinx-build
 )
-set SOURCEDIR=.
-set BUILDDIR=_build
+set SOURCEDIR=source
+set BUILDDIR=build
 
 %SPHINXBUILD% >NUL 2>NUL
 if errorlevel 9009 (
diff --git a/pyneon/recording.py b/pyneon/recording.py
index b3e33b0..23246f1 100644
--- a/pyneon/recording.py
+++ b/pyneon/recording.py
@@ -164,5 +164,10 @@ def concat_channels(
             Resampling method for columns of float type, by default "linear".   
         resamp_other_kind : str, optional
             Resampling method for columns of other types, by default "nearest".
+        
+        Returns
+        -------
+        concat_data : pd.DataFrame
+            Concatenated data.
         """
         return concat_channels(self, ch_names, resamp_float_kind, resamp_other_kind)
diff --git a/docs/conf.py b/source/conf.py
similarity index 100%
rename from docs/conf.py
rename to source/conf.py
diff --git a/docs/index.rst b/source/index.rst
similarity index 71%
rename from docs/index.rst
rename to source/index.rst
index 11cfb0c..cc49de9 100644
--- a/docs/index.rst
+++ b/source/index.rst
@@ -13,7 +13,7 @@ Installation
 ============
 
 To install PyNeon, clone the PyNeon repository from
-https://github.com/NCCLabMPI/pyneon and run:
+https://github.com/NCCLabMPI/PyNeon and run:
 
 .. code-block:: bash
 
@@ -24,7 +24,9 @@ PyPI and conda releases are planned for the future.
 Data format
 ===========
 
-PyNeon works with the "Timeseries" data format as exported from Pupil Clouds. The data could be from a single recording or from a project with multiple recordings.
+PyNeon works with the "Timeseries Data" or "Timeseries Data + Scene Video" formats 
+as exported from Pupil Clouds. The data could be from a single recording or from a 
+project with multiple recordings.
 
 .. toctree::
    :maxdepth: 1
diff --git a/docs/reference/dataset.rst b/source/reference/dataset.rst
similarity index 100%
rename from docs/reference/dataset.rst
rename to source/reference/dataset.rst
diff --git a/docs/reference/index.rst b/source/reference/index.rst
similarity index 100%
rename from docs/reference/index.rst
rename to source/reference/index.rst
diff --git a/docs/reference/preprocess.rst b/source/reference/preprocess.rst
similarity index 100%
rename from docs/reference/preprocess.rst
rename to source/reference/preprocess.rst
diff --git a/docs/reference/recording.rst b/source/reference/recording.rst
similarity index 100%
rename from docs/reference/recording.rst
rename to source/reference/recording.rst
diff --git a/docs/tutorials/index.rst b/source/tutorials/index.rst
similarity index 100%
rename from docs/tutorials/index.rst
rename to source/tutorials/index.rst