I actually agree with you, those clues are very important. But video conferencing is bad at conveying those clues. So bad actually, that apart from the QA engin

I actually agree with you, those clues are very important. But video conferencing is bad at conveying those clues. So bad actually, that apart from the QA engineer waving at the camera, you wouldn't notice. There is no corner he can shrink into, you will never see that body language looking at his head. He won't shrink away from the people in the room, because there are no people to shrink away from. All those things require actual presence to work. A camera is no substitute and will always mislead you.