David Fox, creator of Zak McKraken, lead on Labyrinth and other very early LucasFilm Games
has posted some interesting archival video clips (quicktime) on his website.
The video was first shown at the Lucasfilm Games press conference on May 9, 1984 to introduce their first two games, Rescue on Fractalus! and Ballblazer.
About the Video
At the press conference in 1984 where this video was first shown, the idea was to present only imagery captured directly from the game. We felt our first two games were breakthrough enough that we didn't need any special effects, and indeed, we were concerned that if anything on the screen was created outside the game, people might think everything was. That's why we chose to show a blank screen for the first minute and twenty seconds rather than creating any non-game imagery.
To prepare this video, first a script was written with all the dialog and scene descriptions. Dialog was recorded at Robert Berke Sound in San Francisco using professional voice-over actors. Then the video was captured to tape directly from an Atari 800 computer. The video and the voice were then edited together, and a few video transitions added between scenes. The only part of the video that was not from the Atari is the end sequence.
Click here for Rescue on Fractalus
and here for Ballblazer
There's more information on these two games and the early LucasFilm Games setup at this webpage
by former employee Peter Langston, including some rather wonderful magazine & newspaper scans from 20+ years ago. Update
: I'm having problems playing the video clips in Explorer, though they launch and play OK in Opera. David Fox himself has stopped by and commented below.