I know we have the "Comedy on Youtube" thread, but it's mostly for short videos and Funny or Die things and stuff like that. The idea for this thread is to post things that are obscure or that you remember from your childhood that still make you laugh.
I got the idea when I found this channel on Youtube which is devoted to off-air recordings from HBO from the early '80s. There's a lot of interesting stuff here, like a "Not Necessarily the News" special and "Rich Little's Robin Hood". What I'm going to post though is the movie "Pandemonium", which was one of my favorite silly comedies when I was a kid. It's a parody of slasher movies like "Friday the 13th" and their ilk, but the humor in it is very gentle and goofy for the most part.
Here's the first part. The movie stars Paul Reubens, Tommy Smothers, Carol Kane, and Judge Reinhold, with lots of cameos by other people (watch for Phil Hartman near the beginning). If you've never seen it before, you're in for a treat.