Great video. I'm still practicing just spinning splittimr with arms crossed. I can do it same time, but as soon as I try split I bonk myself in the head.
You've still got plenty of time to learn! I know it's frustrating to get stuck on specific parts of a move (I'm actually wrestling with that on a particular move right now myself) but I promise it is worth it! Be patient with yourself and it'll be worth it in the long. In the meantime, kudos for doing the work and keeping with it!