Hi,
since some days YouTube hasn’t been working correctly anymore. Some times I could open the AddOn and after opening a video twice or more times, it was played. But since yesterday I can’t open the Addon at all.
In the logfile:
20:32:42 69.094749 T:2686448672 NOTICE: -->Python Interpreter Initialized<-- 20:32:56 83.419830 T:2686448672 NOTICE: [plugin.video.youtube] Running: YouTube (5.1.10) on Isengard (15.2) with Python 2.7.9 20:33:45 132.901764 T:2686448672 ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<-- - NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS! Error Type: <class 'urllib2.URLError'> Error Contents: <urlopen error [Errno -2] Name or service not known> Traceback (most recent call last): File "/home/osmc/.kodi/addons/plugin.video.youtube/default.py", line 7, in <module> runner.run(__provider__) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/kodion/runner.py", line 32, in run __RUNNER__.run(provider, context) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/kodion/impl/xbmc/xbmc_runner.py", line 23, in run results = provider.navigate(context) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/kodion/abstract_provider.py", line 123, in navigate result = method(context, re_match) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/kodion/abstract_provider.py", line 157, in _internal_root return self.on_root(context, re_match) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/youtube/provider.py", line 487, in on_root self.get_client(context) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/youtube/provider.py", line 149, in get_client refresh_tokens[0]) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/youtube/client/login_client.py", line 131, in refresh_token_tv grant_type=grant_type) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/youtube/client/login_client.py", line 161, in refresh_token result = requests.post(url, data=post_data, headers=headers, verify=False) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/kodion/simple_requests/api.py", line 184, in post return _request('POST', url, data=data, json=json, **kwargs) File "/home/osmc/.kodi/addons/plugin.video.youtube/resources/lib/kodion/simple_requests/api.py", line 155, in _request response = opener.open(request) File "/usr/lib/python2.7/urllib2.py", line 431, in open response = self._open(req, data) File "/usr/lib/python2.7/urllib2.py", line 449, in _open '_open', req) File "/usr/lib/python2.7/urllib2.py", line 409, in _call_chain result = func(*args) File "/usr/lib/python2.7/urllib2.py", line 1240, in https_open context=self._context) File "/usr/lib/python2.7/urllib2.py", line 1197, in do_open raise URLError(err) URLError: <urlopen error [Errno -2] Name or service not known> -->End of Python script error report<-- 20:33:46 133.021286 T:3024970288 ERROR: GetDirectory - Error getting plugin://plugin.video.youtube/ 20:33:46 133.029099 T:3024970288 ERROR: CGUIMediaWindow::GetDirectory(plugin://plugin.video.youtube/) failed
After reinstalling OSMC it doesn’t work as well. 
Hope you can help me!
Many greetings from Germany,
Maxi