unique entries stored procedure

IF NOT EXISTS(SELECT @uid,@post_id,@travelerid FROM web_like_log WHERE uid=@uid and post_id=@post_id or travelerid=@travelerid)

get you tube thumbnail images

http://img.youtube.com/vi//1.jpg
http://img.youtube.com/vi//2.jpg
http://img.youtube.com/vi//3.jpg
http://img.youtube.com/vi//0.jpg