Your last two reps look better than your first two reps (if slower). You're not doing a good morning, because your chest is still rising at a proportional rate to the hips.
The hip drive is good on the last two reps. On the first two reps, it's not hip drivey enough.
Your biggest problem, as I see it, is that your wrists are extremely bent, which may be causing the rolling action. That and not having an extended upper back.