Zoom at least uses Cmd+Shift-A for Audio and V for Video
But as the recent Google Icon kerfuffle, UI/UX is not their strength (probably because of opinionated technical people that think you need to A/B shades of blue)
Teams uses something equally silly, like Ctrl+Shift+M for mute/unmute, IIRC.
Which is pretty annoying, because the mute button is about the most important button in a videoconferencing tool, and I want to have it under a single keypress, so it can be used effortlessly, with my left hand (the same that operates Alt+Tab, while my right hand is on the mouse, scrolling ... well, meeting agenda, let's say).
I'd fix that for myself with AutoHotkey, but I can't, because Teams is just another Electron app, so I can't just look at which UI component has the focus to create a rule, "if focused on Teams video call and not its chat, rebind M to Ctrl+Shift+M".
One of the countless reasons I hate it when people do custom UI, instead of using OS-provided controls.
But as the recent Google Icon kerfuffle, UI/UX is not their strength (probably because of opinionated technical people that think you need to A/B shades of blue)