Fantastic thread. You've even got SMPTE-style timecode extractable from the player. Great contribution!
One thing though- as I understand it QT Player 7 (of which I was very fond for its quick-edit abilities) no longer functions in OSX versions after El Capitan (10.11.6). I run High Sierra (10.13.6) and when I try to run .mov files originally encoded for QT 7, I get a "must be converted" dialog. Some convert to the new core foundations, some don't. But the general wisdom is, with no QT 7 frameworks in the OS the player is retired.
I should test whether QT X files can run under QT 7 but it won't surprise me if they don't.
Best, as always,
Loren