Jumping on the animation bandwagon, here's one I directed. The script was written by a five year-old promising comedy writer, so don't expect any clever word play or political satire, but if you like jokes about farts... 
Another animation
"Your hair is shaped like a poo" 
''im the fart police, I will arrest myself''
'Hair shaped like a pooh!'... This is one of the rare things posted on the critique that I have lol'd at!
Its so stupid that it's funny. Nice work from the 5 yr old!
Poo* not Pooh.
Hair shaped like
WTF!!! GENIUS!
My daughter absolutely loves this, Dolly.
"Shop stinker"! Really laughed at this, Dolly. You've obviously found our level.
On one hand I'm filled with parental pride, on the other I'm ashamed that I haven't written anything as funny.
That was jolly amusing.
I think all of the videos should use that man's voice. It makes everything funny automatically.