To the irritation of my kids, when I’m starting a DVD that we’re watching, I always go to the “Special Features” on the Menu page before I even start the feature–I’m looking to see if there any bloopers (aka “Gag Reel”). Love that stuff.
YouTube has a lot of compilations–the one below is for one of my favorite old actors, Humphrey Bogart. If you do a search on “Breakdowns” (what they used to call “Bloopers”) on YouTube, you’ll get a lot of them. Here’s Bogey: