The amount of things I've learned making this is kind of staggering - like being on a new planet.
When I looked at the original record, I was really pleased that it encoded! Then pretty annoyed at what the compression had done to it (artifacts - good for Indiana Jones, bad for HitRECorders).
So I did some Googling and found a YouTube vid showing how to compress videos so that they don't come out looking like you rolled them around in the Temple of Doom. Hooray for the internet!