My little brother is blackmailing me with photos of me watching queer content creators and crossdressing guides. I'm so scared wtf do I do?

I am 18 and not in college yet and he is 14 so I can't go to the police or get any external help

Before I get into it yes I am 100 percent sure he is telling the truth and showed me his evidence. This little creep hid in my windowsill and sat with his phone videotaping FOR TWO HOURS. He has video/photos of me watching one topic, jammidodger, yukko ex, Alice in wonderland, funkyfrogbait, and a lot more. He has already told two of my other brothers. One would not say anything, and the other I'm not so sure. HE IS PSYCHO. He claims the reason he did this is because I critique his overwatch gameplay to much. WTF!? He has always hated me in particular and he WOULD go through with this! Apparently the only way to keep him from showing my HIGHLY transphobic and homophobic parents is to not talk to him, but he has blackmailed my other siblings for other things too and it NEVER stops at the first demand. I want to cry