the official music video for Johnny B. Goode and it contains some very interesting deleted shots of Michael J. Fox, most notably an exchange at the end where he appears to coin the term
"rock 'n roll." A few people have uploaded this video (from the same source), but this one seems to be the earliest upload:
https://youtu.be/nTn3DG3maXE
Ronster, this is a much higher-quality upload: