Java - How to get a random video by hashtag using youtube api

I need a way of get a random youtube video by hashtag. as example #meme

How can I do with with the YouTube API? (Java)

as requested here is what i tried so far:

1. went through the api and examples at youtube dev site. http://www.youtube.com/dev/ no luck finding the correct api or a way of doing it there.

2. google search. got http://randomyoutubevideo.net/ but they only offer an api from THEM to use in between me and youtube. < this gives me hope that it IS actually possible to do this.

Thank