Went to the LA museum today, and they have:

The Atari "More that Pac-Man with a Bow" Ms.Pac commercial
The Ad for the Dig-Dug Arcade
and a Gameline commercial!

There's more if you don't mind waiting a week; more Atari and Coleco commercials.

Sadly, Saturday Supercade was the first thing I inquired about to the archive computer, but I got a blank. Same with the Hanna-Barbera Pac-Man cartoons.

Fun non-gaming stuff:
The first Sesame Street: Oscar is as Orange as a Chee-to, Bert has a huge nose, and Big Bird appears to ride the short bus.
The initial radio reports of Hitler's death
Every single Wendy's "Where's the Beef?" Commercial
the first Hour of MTV
William Hartnell Dr. Who
Animated Star Trek.