Hard crash with Quicktime on simple edits, no help from Apple

I use Quicktime player as a direct and simple way to trim the head and foot of videos I record in ecamm. I'm on a Mac Studio with Apple silicon and plenty of ram and hd space. Sonoma 14.5 and Quicktime is 10.5, the latest version. Sometimes once a week, sometimes three times a day, QT freezes completely on the split clip command and even the power button won't restart. I have to unplug and restart from there. Console shows no reports. I know QT has been problematic for years here and there, and Apple support was zero help. Any suggestions on what I might try? Thanks. I tried to edit videos, I expected it work, it crashed instead.