I wonder if Apple Cinema Tools (part of Final Cut Studio) can reflag it as 24fps which would then give you the overcrank look. The individual frames might have issues given the lower data rate per frame. I haven't tried this but I believe I've read others have done this.

Craig QuickTime will let you know the data rate as it plays back. I would test right now but my machine is on a long render. Once it is done I will test your theory. This was the way I found the XDR Flash data rate. I think there is a way in FC but I can't remember right now.

Yes, once wrapped as MOV. You'll find the playback data rate is always round 35mbps. I've seen some cases of around 30mbps but that had large fields of white.

I will have to try that. Thanks for the tip.

I believe Cinema tools can't handle Long GOP conversions so you may need to render to ProRes. Apparently others have tried that route (720p60 to ProRes to 720p24/60) and it worked. It isn't likely to look as good as true 720p24/60 my guess because you're starting with a lower data rate per frame (going to ProRes can't improve that) though.