Windows is chock-full of mildly infuriating quirks that seemingly exist for no reason. One of those quirks is the fact that you can’t use the same camera in multiple apps simultaneously (at least without a third-party app that virtually clones your webcam feed). Speculation abounds as to why Microsoft imposes this restriction. Perhaps it has something to do with privacy or security. Or the possibility of collisions when different apps try to adjust the webcam’s settings in contradictory ways. Or maybe it has to do with performance issues, which really was an issue back in the days when PCs wer…