Here we list some methods to get YouTube RSS.
The information from Google YouTube.
Retrieving a user’s playlists
This section explains how to retrieve a feed listing a specific user’s playlists.
To request a feed of the currently logged-in user’s playlists
http://gdata.youtube.com/feeds/api/users/default/playlists?v=2
To request a feed of another user’s playlists
http://gdata.youtube.com/feeds/api/users/username/playlists?v=2
Retrieving a single playlist
As noted in the previous section, each entry in a user’s playlists feed contains a <content> tag that specifies the URL for retrieving the list of videos in the playlist. The following example shows the URL for retrieving a playlist as that URL appears in a playlists feed entry:
<content type=’application/atom+xml’ src=’http://gdata.youtube.com/feeds/api/playlists/8BCDD04DE8F771B2?v=2‘/>
More details please read google api page