Fake camera prerecorded video

Hi, I need to make a fake webcam. I want to pre-record a video and use that video as an image source.
I tried OBS, but I have problems with Syphon Inject, apparently it just doesn't work anymore, I also tried ManyCams, but it is detected by some sites. What other ways to solve this problem?

P.S. I have MacOS, M1 Pro.

You could try Reincubate Camo, it’s slick on M1 chips. Not perfect but it’s definitely worth a shot.