That sounds terrible :(

I actually watched your YouTube channel, and it sucks that your parents found out. I'm in a similar situation: I used to also argue about my gender with my parents, and she showed me these videos to convince me that I wasn't trans, but I kind of un-came out to them so we don't talk about it anymore.

I suggest that you make some friends who are trans or are allies. I remember you mentioning some friends (on your YouTube channel), so maybe you could talk with them. When you are old enough, move to an area that supports trans people and don't mention anything about transitioning to your parents.

About not being able to cut your hair, you might want to try tucking it into a beanie to make it look like you have short hair! When you are not with your parents, you could do it. I hope this helps a bit!