OP your story sounds pretty ambiguous to say the least,
Exactly, do scammers really make video calls and expose their real identities or this is just another story that was not well fabricated.
Exactly my thought too. Scammers would always do all they can to avoid having video calls. I don't know what to make out of OP's story. Another thing I observed is the "switching on of something on Metamask" I use metamask and I don't know of anywhere that could be switched on there that can give another person access to a remote device. However, I know scammers use something called TeamViewer or so to gain access to a remote device, normally a PC. But that's' an app on its own and it's not directly linked to a wallet. Perhaps, OP didn't explain that part well.