Here’s my solution to this:
This happened with me where someone video called and I received. But the video was blank in the call. I was trying to find out who, cuz my friends usually prank me with new numbers.. later I get a video of myself a cropped video of similar situation and I panicked. What the hell. Later threatening continues, I told do what u want. Send it to my my wife, friends, family. Nothing happened as I had a reasonable explanation that this happened and they’re trying to threaten and it’s pretty common these days. Don’t fall for it. I just blocked him and he continued to msg from diff numbers. Here’s what I did later. Deactivated all social media. And changed whatsapp number. If changing is not a solution. Then blocking is. Just keep blocking and don’t respond.