> I just want to momentarily stop video, just like audio mute.

Sorry, but we both mean the same target: "temporaly stop my video". The problem is that you are requesting HOW to do that (and you request doing that without reINVITE).

If I send reINVITE for pausing my video then I get the **same** effect as you. Still I can talk to you, and you don't see a black video screen but instead a notification telling that "I have temporaly disabled my video", which is just perfect and expected and understandable.

There is no benefit AT ALL in your way. So please stop arguing "I just want to momentarily stop video" because me too.