One of my favorite comedians - Stevie Riks - was recently dealt a setback when YouTube deleted both of his accounts. No one is saying why they were deleted, but it might have something to do Riks - who mostly imitates British rock stars from the '60s and '70s - doing near-perfect impressions of his subjects' music catalog without regard for copyright law.
Here's one of his older videos - wherein he imitates George Harrison making a curry.