Webcam not working after MacOS update to version 11.2.1 I have a 16 inch MacBook Pro. The webcam on it was working fine before the update. But since the update, when I open FaceTime, it shows I guess what is the first frame, and that's it - there's no video feed from the webcam, just a dark, static image of the first frame:

Has anyone else faced this issue? And how do I fix it? I tried restarting the system a couple of times, but that didn't fix the issue.
The webcam is working fine now. So, I want to note down what I did (although, it isn't much, and I'm not sure how or what exactly fixed the issue).
I stumbled across this post, asking a similar question. And I decided to follow along with the only answer in it. So, I shut down my mac, held down the D key, and switched on the mac. I kept holding the D key, and it booted a second time and went into recovery mode or something - it asked me to select a WiFi access point and enter its password. I got scared and clicked on the power button and restarted the system.
And that's it; when I open FaceTime now, it works fine. So, yeah, not sure what happened, but the issue seems to have been fixed somehow.