>>94245473They're not from tape (analog tape is SD only), they're rescanned from the film they shot the cels on. Animation was often edited on videotape but beyond the amateur level never shot on it, the quality would be too poor.
I am unsure if these shows were originally edited by hand on film
or if Disney reconstructed all the edits digitally from raw footage (as is the case for HD remasters of shows edited on videotape originally like Friends and Seinfeld)
Older all-analog shows all have a shot of being scanned in HD provided the film
still exists (clearly Disney takes care of theirs, but The Simpsons for example has been confirmed impossible to do because Fox can't turn up the necessary materials)
Pre-HD digitally colored shows from the early 2000s are out of luck though (A:TLA for examle will never ever be HD)
