... this [the program has ceased to read video quality above 720p] happened with the transition to the latest version, and not spontaneously. I do not think that the problem really appeared in the phone ...
At first, I thought that this was the case with the latest versions of the program, since they are problematic, but I was embarrassed by these words:
I tried a bunch of versions, even the 18th year - the same thing.
It means that either somewhere the “tails” of the latest version remained (but, I think, this is unlikely), or something went wrong, and the matter is indirectly on the phone. On my device, after the usual reinstallation of the old version after the new one, the functions of the video editor again start working without problems.
If I had such a situation, I would probably resort to an extreme and radial measure, which is called "reset to factory settings." Moreover, this procedure is sometimes simply necessary by itself.)