Quick update on what I’ve found so far:
I tested both a high-res and a compressed video file on my Windows 10 machine. Both played fine — playback was a little choppy, but manual sync worked as expected. The +1 sec button didn’t jump to the end, and accepting the offset didn’t cause any weird behavior.
Since I’m working remotely right now, I won’t be able to check it on a Windows 11 setup until Monday, but I’ll follow up then.
I also looked into the BugTrap crash log you shared (link). It turns out the crash isn’t directly caused by video playback, which is a good sign. In your case, it happened when pressing Next frame while the video cursor was outside the valid range. I’ll protect agianst that in the next build.
Sven’s crash looks more random — I couldn’t reproduce it exactly, but I’ll be adding a fix just in case.
Figuring this out is high on my list, so I’ll keep the updates coming.