I'm also experiencing the same issue (except on my iPhone) and have no idea why this is happening. Did you by chance figure a workaround?

I'm also running into the same issue here. None of the bug reports in the comments above are visible on feedback assistant. I've tried exporting at 720p, among other resolutions and still run into the error occasionally. In addition - it kills all the other active AVPlayer's in my app (presumably because this is a daemon crash?). This is on iOS 15 as well.