PeopleForBikes.org has made a “Shit Cyclists Say” video, inspired by the popular “Shit Girls Say” videos and all the videos that followed from it. This video is more roadie specific, but should still be funny to most cyclists. I hope someone comes out with a video for, bike commuters, touring cyclist, cargo bike, etc. As long as they are cyclist related I’m sure they will be funny.
There is also a “Shit Mountain Bikers Say” by IHTtwo.