Doesn't look bad, although your back arch looks a little excessive. You definitely want to create tightness (which you're doing well), but I prefer a flatter back to initiate the pull. That being said, a severe arch is much better and safer than severe rounding in the other direction.
Push through with your hips more as the bar comes up. You're not pushing through with your hips at all, and you're losing a lot of power that way. Basically like you're fucking the air, lol.
Are you holding back speed-wise when you initiate the pull? I would like to see the bar come off the ground faster at the start. Get more aggressive with the first part of the pull. If you can create more bar speed earlier in the lift, it will help tremendously.