Wow! Thanks!
I know the extensions don't mean much, but I just need to know what I'm working with. Now I can forget them.
And I like thinking of interleaving as interweaving. That explains a lot. Thank you.
And thank you for the site to get the program for avi copying. That's great. If I need a user guide for it, there must be one around somewhere. I'm terrible with written instructions because I'm slightly dyslexic. I do best when shown how to do something, which isn't possible most of the time on computers.
I really really appreciate your help on this. I think I just may get the hang of it one day. Sorry your TV show won't play. I wonder how they get TV shows into shared files. But I've got enough on my plate for now. Once I get the movies figured out, I'll go on to the next project.
Thanks again!