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 <link> elements. And if there are still more records to fetch one of it is of the form <link rel='next' ... e.g.

<link
  rel='next'
  type='application/atom+xml'
  href='https://gdata.youtube.com/feeds/api/playlists/plalistID?start-index=26&amp;max-results=25&amp;v=2'
/>

Search for this element and retrieve the document that the href attribute points to until the repsonse has no <link rel='next' element.

Answer 2

YouTube API v3

You need to request the PlaylistItems > list feed:

https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=25&playlistId=PLVfin74Qx3tV8bgAhzbfDpnfPoGmJWAcn&key=YOUR_API_KEY

The JSON returned by the API will contain these properties:

• nextPageToken
• prevPageToken

Pass one of these values in the pageToken query string parameter to retrieve the next or previous "page" in the result set:

https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=25&playlistId=PLVfin74Qx3tV8bgAhzbfDpnfPoGmJWAcn&pageToken=xxYYzz&key=YOUR_API_KEY

The JSON also contains pageInfo.resultsPerPage and pageInfo.totalResults properties.

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^{YouTube API v2 answer is here.}