Doesn't look too bad man what I will recommend:
when you walk the weight up, get your feet right in as few steps as possible, very short. Keep your head facing forward instead of watching your feet.
Try to get your elbows a little more under the bar, your torso angle and elbow angle are usually the same
Other than that as said before no glaringly obvious things wrong.
EDIT: also you are having trouble with the bar position so you mean transferring to the low bar position? Basically it should be sitting on top of your rear delts and below your traps, it creates a nice shelf. One way I've helped myself find this position was by picturing bending the bar across my bar, which also reinforces lat tightness.