I an owner of Microsoft surface book 1st gen with performance base, i updated my windows from 1809 to the latest as of today which is 20H2, from that point my cameras stopped working, i thought its a hardware issue ( i was also told by Microsoft engineer) but we were wrong.
I rolled back my windows to the time they were still working and installed the surface update and wallah it started working again.
I then updated from 1809 to 1909 the cam was still working. i then updated each driver independently using iobit driver booster pro it was still working fine until when i updated Intel(R) control logic when my camera started again having issues.
So to anyone who has issues with their integrated camera you can update everything but DO NOT update the intel control logic drivers it is some kind of a bug. The stable version 30.15063.6.8611
I hope Microsoft does fix the issue soon.
Please DO NOT disable or Uninstall the camera wont work. Thank you all.