The what if?!! scenario you describe has never happened. Blackmail scammers do not do the things you describe. They work on fast money and volume. As soon as the victim resists by blocking everywhere and not talking, they move on to the 200 others they try to scam that week. When the video was deleted at youtube, it no longer existed anywhere. As soon as they have given up on the victim, they don't even give them another thought in the future. Could you remember almost 11,000 names after a whole year?
Here are some links for you to help reassure you.
Closure. When will this all end? NEW! Coping Strategies!viewtopic.php?f=3&t=4509Interview with a blackmail survivor:
http://scamsurvivors.com/podcasts/ Scroll up to podcast #11.
Also read the main topic for more information here:
viewtopic.php?f=20&t=580