I have nothing to do with any of the videos uploaded to video sharing website www.revver.com, but I would suggest that any Looney Tunes fanatic type in "Looney Tunes", Merrie Melodies" or "Warner Brothers Cartoon" in the search field. There is a ton of rare and interesting stuff on there, and much of it is worth a look. There are some color-redrawn versions you will want to avoid, but there's also rare stuff like this:
I wouldn't bet on these showing up on TV anytime soon, and many of them are extremely hard to see. Check this stuff out before it's gone!