These are just a few of the notable examples. I am sure there are dozens of records of which are unknown even to Nazareth himself.
I have no idea what contribution I could make to finding these videos. I am engaged in website development and web design. Billy, if you need my services, I’d love to work for you.
By the way, a long time ago I made covers for my father’s home collection. He restored videos that he could find. There is you on these covers. 🙂