Deadlift - first time form check

[RL2]

This is my first time posting a deadlift form check. I was lifting 320x5 and finally videoed myself and saw I was arching the hell out of my back. I've been re-reading the deadlift section of SS and following Rip's five step setup, but am still having a hard time getting it all dialed in. Earlier in the week I saw I had been starting with hips too low and they were rising much faster than the bar. In the video I try to start with them higher.

If it helps, I'm 6'3 and have a long torso

225x5

[Matt Stacks]

There's not much we can tell from this angle. The plates are blocking damn near all the important stuff.