Earlier quoted context omitted.
Tbh it's kind of strange that it's 2021 and we still can't have good quality bidirectional audio over bluetooth. WHY?
Mostly because of the need to keep BT a low-energy medium. Bluetooth was designed for embedded devices that need to conserve power. That said, I know that there's active work going on, to improve this exact thing. Might be a while before we see video over BT, though.
In which case would that be useful?
There seems to be a range of broadcasting features, but if I'm not mistaken they mostly use WiFi.