diff --git a/files/en-us/web/api/document/exitpictureinpicture/index.md b/files/en-us/web/api/document/exitpictureinpicture/index.md
index 5be70fd2980c06d..f8c067c592e4f39 100644
--- a/files/en-us/web/api/document/exitpictureinpicture/index.md
+++ b/files/en-us/web/api/document/exitpictureinpicture/index.md
@@ -30,6 +30,11 @@ A {{jsxref("Promise")}}, which is resolved once the {{Glossary("user agent")}} h
 finished exiting picture-in-picture mode. If an error occurs while attempting to exit
 fullscreen mode, the `catch()` handler for the promise is called.
 
+### Exceptions
+
+- `InvalidStateError` {{domxref("DOMException")}}
+  - : Thrown if `document.pictureInPictureElement` is `null`.
+
 ## Examples
 
 This example causes the current document to exit picture-in-picture mode whenever the
diff --git a/files/en-us/web/api/htmlvideoelement/requestpictureinpicture/index.md b/files/en-us/web/api/htmlvideoelement/requestpictureinpicture/index.md
index 04529704d1642b8..267d04ec2bf593a 100644
--- a/files/en-us/web/api/htmlvideoelement/requestpictureinpicture/index.md
+++ b/files/en-us/web/api/htmlvideoelement/requestpictureinpicture/index.md
@@ -34,8 +34,14 @@ object that can be used to listen when a user will resize that floating window.
 
 ### Exceptions
 
+- `NotSupportedError` {{domxref("DOMException")}}
+  - : Thrown if the feature is not supported (for example, disabled by a user preference or by a platform limitation).
 - `SecurityError` {{domxref("DOMException")}}
-  - : Use of this feature was blocked by a [Permissions Policy](/en-US/docs/Web/HTTP/Permissions_Policy).
+  - : Thrown if the feature is blocked by a [Permissions Policy](/en-US/docs/Web/HTTP/Permissions_Policy).
+- `InvalidStateError` {{domxref("DOMException")}}
+  - : Thrown if the video element's `readState` is `HAVE_NOTHING`, or if the video element has no video track, or if the video element's `disablePictureInPicture` attribute is `true`.
+- `NotAllowedError` {{domxref("DOMException")}}
+  - : Thrown if `document.pictureInPictureElement` is `null` and the document does not have {{Glossary("transient activation")}}.
 
 ## Security
 
diff --git a/files/en-us/web/api/pictureinpictureevent/pictureinpictureevent/index.md b/files/en-us/web/api/pictureinpictureevent/pictureinpictureevent/index.md
index f9606c4fd97cbf6..154dbf74a88a5ea 100644
--- a/files/en-us/web/api/pictureinpictureevent/pictureinpictureevent/index.md
+++ b/files/en-us/web/api/pictureinpictureevent/pictureinpictureevent/index.md
@@ -8,8 +8,7 @@ browser-compat: api.PictureInPictureEvent.PictureInPictureEvent
 
 {{APIRef("Picture-in-Picture API")}}
 
-The **`PictureInPictureEvent()`** constructor returns a new {{domxref("PictureInPictureEvent")}} object with an optional {{domxref("EventTarget")}}.
-When the event has both a source and a destination, the `relatedTarget` value must be set to the other target.
+The **`PictureInPictureEvent()`** constructor returns a new {{domxref("PictureInPictureEvent")}} object.
 
 ## Syntax
 
@@ -20,11 +19,11 @@ new PictureInPictureEvent(type, options)
 ### Parameters
 
 - `type`
-  - : A string representing the name of the event.
+  - : A string representing the name of the event. It is case-sensitive and browsers set it to `enterpictureinpicture`, `leavepictureinpicture`, or `resize`.
 - `options`
   - : An object that, _in addition of the properties defined in {{domxref("Event/Event", "Event()")}}_, can have the following properties:
-    - `relatedTarget` {{optional_inline}}
-      - : The related {{domxref("EventTarget")}}, or `null` (its default value).
+    - `pictureInPictureWindow`
+      - : A {{domxref("PictureInPictureWindow")}}.
 
 ### Return value
 
diff --git a/files/en-us/web/api/pictureinpictureevent/pictureinpicturewindow/index.md b/files/en-us/web/api/pictureinpictureevent/pictureinpicturewindow/index.md
new file mode 100644
index 000000000000000..3f09372e03fbdf9
--- /dev/null
+++ b/files/en-us/web/api/pictureinpictureevent/pictureinpicturewindow/index.md
@@ -0,0 +1,27 @@
+---
+title: "PictureInPictureEvent: pictureInPictureWindow property"
+short-title: pictureInPictureWindow
+slug: Web/API/PictureInPictureEvent/pictureInPictureWindow
+page-type: web-api-instance-property
+browser-compat: api.PictureInPictureEvent.pictureInPictureWindow
+---
+
+{{APIRef("Picture-in-Picture API")}}
+
+The read-only **`pictureInPictureWindow`** property of the {{domxref("PictureInPictureEvent")}} interface returns the {{domxref("PictureInPictureWindow")}} the event relates to.
+
+## Value
+
+A {{domxref("PictureInPictureWindow")}}.
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- [Picture-in-Picture API](/en-US/docs/Web/API/Picture-in-Picture_API)
diff --git a/files/en-us/web/api/pictureinpicturewindow/height/index.md b/files/en-us/web/api/pictureinpicturewindow/height/index.md
index 20ee056697ccb00..7678cd5ccacdee8 100644
--- a/files/en-us/web/api/pictureinpicturewindow/height/index.md
+++ b/files/en-us/web/api/pictureinpicturewindow/height/index.md
@@ -8,9 +8,7 @@ browser-compat: api.PictureInPictureWindow.height
 
 {{APIRef("Picture-in-Picture API")}}
 
-The read-only {{domxref("PictureInPictureWindow")}} property
-**`height`** returns the height of the floating video window
-in pixels.
+The read-only **`height`** property of the {{domxref("PictureInPictureWindow")}} interface returns the height of the floating video window in pixels.
 
 ## Syntax
 
@@ -20,8 +18,7 @@ pictureInPictureWindow.height
 
 ### Value
 
-An integer value indicating the height of the floating video window in pixels. This
-property is read-only, and has no default value.
+An integer value indicating the height of the floating video window in pixels if the Picture-in-Picture window is open. Otherwise, it returns `0`.
 
 ## Specifications
 
diff --git a/files/en-us/web/api/pictureinpicturewindow/width/index.md b/files/en-us/web/api/pictureinpicturewindow/width/index.md
index 86eeabd6c0b28d5..a433eee86cd588e 100644
--- a/files/en-us/web/api/pictureinpicturewindow/width/index.md
+++ b/files/en-us/web/api/pictureinpicturewindow/width/index.md
@@ -8,9 +8,7 @@ browser-compat: api.PictureInPictureWindow.width
 
 {{APIRef("Picture-in-Picture API")}}
 
-The read-only {{domxref("PictureInPictureWindow")}} property
-**`width`** returns the width of the floating video window in
-pixels.
+The read-only **`width`** property of the {{domxref("PictureInPictureWindow")}} inbterface returns the width of the floating video window in pixels.
 
 ## Syntax
 
@@ -20,8 +18,7 @@ pictureInPictureWindow.width
 
 ### Value
 
-An integer value indicating the width of the floating video window in pixels. This
-property is read-only, and has no default value.
+An integer value indicating the width of the floating video window in pixels if the Picture-in-Picture window is open. Otherwise, it returns `0`.
 
 ## Specifications