Recording video from a webcam without interfering with other recording?

Question

Video broadcast

I ’m looking for a program to record video from a webcam or some way to turn off any program when accessing a webcam with another program
, I’ll explain, I tried a lot of programs, but if you need to talk on a viber or a cart on a webcam, it’s terribly annoying when you have to climb to turn off the recording, then call back to a person, and then also don’t forget to turn on the recording back, I

tried a virtual camera, but the PC eats a lot of resources, for my decrepit laptop, an unaffordable luxury