But this should not happen when you start such a function, you expect a timely calculation / conversion to the new video result.
I also wondered about it days ago, it was just a short track 10km, it was way too slow for that. A track over 300km would probably take 2 days at the moment until the video is created.
So here is to be expected improvement, but is not the 1. Priority . First, the beta version must be on the market.