Invalid request URI while adding a video to playlist via youtube api
import getpass
 import gdata.youtube
 import gdata.youtube.service

 yt_service = gdata.youtube.service.YouTubeService()

 # The YouTube API does not currently support HTTPS/SSL access.
 yt_service.ssl = False
 yt_service = gdata.youtube.service.YouTubeService()
 yt_service.email = #myemail
 yt_service.password = getpass.getpass()
 yt_service.developer_key = #mykey
 yt_service.source = #text
 yt_service.client_id= #text
 yt_service.ProgrammaticLogin()

 feed = yt_service.GetYouTubePlaylistFeed(username='default')
 # iterate through the feed as you would with any other
 for entry in feed.entry:
     if (entry.title.text == "test"):
         lst = entry;
         print entry.title.text, entry.id.text

 custom_video_title = 'my test video on my test playlist'
 custom_video_description = 'this is a test video on my test playlist'
 video_id = 'Ncakifd_16k'
 playlist_uri = lst.id.text

 playlist_video_entry = yt_service.AddPlaylistVideoEntryToPlaylist(playlist_uri, video_id, custom_video_title, custom_video_description)

 if isinstance(playlist_video_entry, gdata.youtube.YouTubePlaylistVideoEntry):
 print 'Video added'

playlist_entry_id = lst.id.text.split('/')[-1]
 original_playlist_description = lst.description.text
 updated_playlist = yt_service.UpdatePlaylist(playlist_entry_id,'test',original_playlist_description,playlist_private=False)