Funny videos on YouTube?
There are loads. It depends on your taste. Here's one I always find ridiculously funny: watch?v=WxB1gB6K-2AWhat sort of things do you like watching? What's your style of humour? These things could help us answer.
How Animals Eat Their Food by MisterEpicMann.
Anything smosh, nigahiga, or thedominicshow