Okay
I said it on the other submission, you have the potential to be a good singer. Keep practicing. If you can, try to move the sound so that it feels like it's coming out of the top of your head. It's a little difficult to give voice lessons over something like this, but that's the best advice I can give you. To help with keeping your tone, try warming up with fourths. Sing one note, then go a fourth down, then go back to the original note, then take it down a half-step, and sing down a fourth from that, and so on. You may need to practice with a piano at first, and if you just talk to the music teacher at school, they might let you use the piano, when it's not already in use.
Keep practicing. In this video, the music was a bit loud, and it did drown out your voice. Turn up your mic just a bit, and it should help. I'm not much of an artist, so I can't give you any advice there, but as a singer, I can suggest help with that. Good luck.