The 50/50 video opened just fine for me, too. I think it's a quicktime video so maybe you need the quicktime plugin to view it.
I love the video of Pitfall. My dad still has a working Atari 2600 and we hooked it up to an old television set and played that game along with a bunch of other ones. The graphics are really outdated but it was still fun to play the game. If you watch the video it's weird to see a game with such little sound and no background music but I guess that means you could just concentrate on playing the game!