as far as the rails go, everyone is leaning over to the left. The guy with the black/red jacket came at a super harsh angle and left the rail super quickly. Try mountain the rail a bit closer to it and at less of an angle, its' balance from there.
Your 360s are pretty solid, you just need to practice them. On the other side of the spectrum, your brother. He winds up the wrong way so his entire upper body is counteracting the spin which is why he cant get past 180.
Hope this helps. I've only been freestyling for 2 years, and that's what I can catch.