Bigger sensors and bigger lenses are exactly what would solve those core problems. Even after video call compression (which is not always extreme) it is trivial

Bigger sensors and bigger lenses are exactly what would solve those core problems. Even after video call compression (which is not always extreme) it is trivial to tell whether a video was taken with a big sensor/lens or a small one. Compression is no reason to use a crappy camera. Garbage in, garbage out.