Sorry I'm still confused. Do you have a reliable way to detect if a smart glass is recording or not? I never used smart-glasses regularly, but wouldn't it be "on" all the time if one is using it, so detecting the power-on and pairing is kinda useless?

Regular pairing, advertising and control likley use Bluetooth LE for simplicity and battery life. Streaming or transferring video likley use Bluetooth classic for increased bandwidth.

These are two different protocols with different radio behaviour.

So beyond detecting the glasses themselves, which seem like the focus of the project; detecting recording is feasible at the point of transfer to a phone.

The issue is distinguishing it from any other high bandwidth Bluetooth device nearby, such as headphones.