I don't know if I am making things easier...
You may have recorded them in AVI, but it still is the work of the author who made the RZX file. It will sorta be like me downloading a movie file from tasvideos, recording the movie file on the emulator, and saying it is my own when it's not.
Oh, and the head honchos here don't accept AVI files.
It has to be either MKV or MP4.
Quote
We only accept .mp4 and .mkv (h264/aac) encoded files. We have no possibility to encode your files
http://www.longplays.org/upload.php
Though there were MP4 files here and there, it is still the work of another person.