Using Javascript to make a virtual camera that works on windows

I want to make a webapp that takes input from you camera, changes it, and then outputs the resulting video as a virtual camera input that you can use on windows 10. And I want to use javascript so it can run without any installation.

I know that there is a MediaDevices.getUserMedia(), But to my knowledge, this is a method that gets the input from the users camera, not a method that outputs a virtual camera input to the user's computer.

Is there any method that I can use?