Fix for Python2 ElementTree.fromstring not supporting unicode in inpu…

…t string

- Fix #636

resources/lib/youtube_plugin/youtube/client/youtube.py

@@ -21,7 +21,12 @@
 from ..helper.video_info import VideoInfo
 from ..youtube_exceptions import InvalidJSON, YouTubeException
 from ...kodion.compatibility import string_type
-from ...kodion.utils import datetime_parser, strip_html_from_text, to_unicode
+from ...kodion.utils import (
+    current_system_version,
+    datetime_parser,
+    strip_html_from_text,
+    to_unicode,
+)
 
 
 class YouTube(LoginClient):
@@ -1531,7 +1536,10 @@ def fetch_xml(_url, _responses):
                 for response in responses:
                     if response:
                         response.encoding = 'utf-8'
-                        xml_data = to_unicode(response.content).replace('\n', '')
+                        xml_data = to_unicode(response.content)
+                        if not current_system_version.compatible(19, 0):
+                            xml_data = xml_data.encode('utf-8')
+                        xml_data = xml_data.replace('\n', '')
 
                         root = ET.fromstring(xml_data)