Wow. Friend of mine just posted the following scam:
"I just got a video call from a friend of mine it was his face, lasted 2 seconds and hung up then the person texts me in messenger and asks me to help him get a code because their account had been hacked so they could prove it was them"

Seems like they're recording video of people as they answer the call, and using it on other calls.

That's a twist I hadn't seen.