How to get youtube suggestions videos via api?

I noticed in youtube page. for example: http://www.youtube.com/watch?feature=related&hl=en&v=Xr8vUTm64h0 on the right part of the page, there have a suggestions list.

I would like to ask: how to get this suggestions list via api if I have the current video's all th开发者_StackOverflow中文版e information? is it relay on a category search or use other search method? Thanks.

You're probably wanting the related videos feed.

https://gdata.youtube.com/feeds/api/videos/Xr8vUTm64h0/related?v=2&fields=entry(id)

JSON formatted example.