I use OBS for recording videos for my students.

The only snag I've found is that in the fairly rare case that I want to record myself (usually the course introduction video for off-campus students), the sync between the audio and video is a bit out, whereas Quicktime etc tend not to have that problem. Not sure why -- I assume it's because OBS is always putting the video through some processing.

It's not out by much -- not enough to notice for a screen recording or doc-cam for drawing on paper -- but when there's a face in the video the lip-sync isn't quite right.