first : How could you render and export in the cloud if you don't upload them ?
Second : A browser can't deal with local files easily
Last: There is probably none free because it is very expensive to edit video files
Second : A browser can't deal with local files easily
Last: There is probably none free because it is very expensive to edit video files
2: Have you used Google Docs / Other PWAs offline?
3: Yes. Not sure if PWAs have the power to edit locally yet.