Add images of example frames

I think it would be helpful to include, in this repo, digital images of several example frames of film. The Archive website has only a couple of frames. I'd like to see more, showing exactly what the first human-readable frames look like, then what the first encoded frames look like.
It helps to put the GUIDE into context.

Start by reading the GUIDE and reviewing the examples currently available on the Archive website. Identify where this repository stores documentation images and determine which human-readable and encoded film frames should be added. Done means the repository includes several clearly labeled example-frame images that put the GUIDE into context.

Written by the indexing model from the issue text.