This has been implemented by a Monzo competitor actually, I think it’s a pretty terrible idea - although I haven’t tried it, to be fair - because I guess you have to be stationary, in order to verify via video & there can’t be too much background noise for the audio so that’s no good if you’re making you way through a train station & trying to login to the app, for example.
Just to be clear, I know that Monzo plans to use (or already uses - I didn’t have to go through the extra verification)
selfie-to-ID picture comparison services
see
& Jonas has mentioned, that will actually probably be video verification. That’s fine for 2 time verification (once when you register & once when you’re verifying your identity for Monzo - if your card’s been stolen, for example) but I wouldn’t want to use it regularly…