Hey look, it's fine if you feel the need to leave, but your parent should really be more concerned about this. A lot of kidnappings each year are because of the Internet nowadays. If your sister doesn't understand that then it's up to your parents to. Honestly, they should be worried about your wellbeing. That's part of being a parent! Maybe you should emphasize that this video will be public? As in everyone in the world will have access to it? Also, YouTube can track the location and time the video was posted, which can be dangerous.

There's a high chance that nothing will happen, but it's still good to be as safe as possible. Don't worry too too much. Hopefully your sister will take down the video when she realizes how much this freaks you out and how much of a potential hazard it could be. I wish you good luck if you do decide to leave, and I'll miss you. Hopefully you'll be able to come back again sometime?

thank you all for caring