webcam viewer?

In ancient times, Windows would open a webcam and show you what's
going on .

I'm unfortunately running Win11 now. Can anyone recommend a good
webcam viewer?

I just got a decent, affordable termal imager with close-up lens. The
user interface and instructions are of course obtuse. I managed to get
it to save snaps to its SD card, and can open them, but I'd like to
run it in webcam mode too.

VLC Media Player can't seem top find the imager when it's set to cam
mode.