Couple of notes
--you seem unsure of where you want to stand when you back out and waste a little bit of time with the set up (this is an opinion thing though)
Agree, I do this, I'm trying to stop but whenever I get to a working weight, I just feel there are a few more stance adjustments I should make.
--your heels are slightly coming off the floor in certain reps (can't tell on the first set because of trap bar, second set it happens every rep but especially the last one), it could be because of a couple of things: the shoes (chucks are good for deads but olympic shoes are better for squats), knee drift (a bit forward but more inward, I think your center or gravity is shifting ever so slightly away from your heels toward your toes), it COULD be a hamstring flexibility issue but depth looks good and easy so I wouldn't say but you could work on asian squats
Yeah I'll try to focus on staying on the heels
I wouldn't take another video from behind and I bet you will see your knees moving inward out of the whole.
I dont feel like im getting too much knee drift, but ill take a video from the back at some point and post it.