macOs Monterey and a MacBook Air M1, 2020
I tried QuickTime player:
new video recording, select FaceTime camera HD from control menu, the camera light lits but the video window remains black.
Same behavior running iMovie: import new media.
In Preferences:
Screen time is not activated.
Security&Privacy :
iMovie is allowed to use the camera, QuickTime Player not shown in the app list.
Bernard
Apple apps do not show in the Camera Privacy Preference pane. I only have an external camera and opened Quicktime and clicked on Record a new Movie, and selected my camera the camera worked. Quicktime is o showing in Camera Privacity pane.
Try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.
How to use safe mode on your Mac - Apple Support
A lot of times just boot to Safe Mode followed by normal boot resolves problems.
Apple apps do not show in the Camera Privacy Preference pane. I only have an external camera and opened Quicktime and clicked on Record a new Movie, and selected my camera the camera worked. Quicktime is o showing in Camera Privacity pane.
Try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.
How to use safe mode on your Mac - Apple Support
A lot of times just boot to Safe Mode followed by normal boot resolves problems.
Inside camera works with Facetime only and no other applications
