How about suggesting to them that you only put your voice on YouTube and not your face. I do agree with your parents to an extent, it could be a little risky. You really don't know who could be looking at it.
Don't do anything behind their backs, they'll find out eventually and you'll get into a lot of trouble. Talk to your parents about it and see what they would be comfortable with and see if you can come to some kind of compromise. There are other routes to pursuing your singing than YouTube.
Have you considered joining any local clubs or groups? Often they'll teach you better ways to sing so that you can improve. Most drama clubs will have some kind of singing section.
Ask at your school if there's anything you can get involved in. Good luck! :).
If they are worried about you yourself being broadcast across the Internet and not your voice, just record your voice, put in a video and just make a slideshow of random pictures to go along with the singing if that makes sense. Therefore, you are perfectly safe as your picture is not up there for any random strangers to take. Voila!
Good luck with your singing.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.