I believe Apple is letting
QuickTime die. They are one of the few who continue to display the format. I have no solution over than getting someone to write, perhaps, an AppleScript that could run the current WC output through another app that would convert the format to a more modern, 'standard' one. Alas, even AppleScript is on 'life support'.
BTW,
Evocam is no longer being developed and maybe not even supported.
I suspect
Stu has this on a future update list. He'll be back from his vacation soon and may have a more useful comment.