How get all videos from a playlist using youtube api?

Question

Now i am using this link

http://gdata.youtube.com/feeds/api/playlists/plalistID

to retrieve video from YouTube playlist. but the problem is

Answer 1

Youtube let's you fetch up to 50 entries per request.
The response contains some elements. And if there are still more records to fetch one of it is of the form e.g.

Search for this element and retrieve the document that the href attribute points to until the repsonse has no element.