2 things Colm -
1 - looks like you're tight overhead and it's tweaking your position a bit. keep stretching out those shoulders and upper back.
2 - when lowering the bar, try to pop up with the toes to meet it sooner so you're not controlling it down so far so slow - that's a super awkward position for your shoulders no matter how flexible you are and it's going to end up bothering you eventually if not right away. Watch how the bar is brought down here
- that's what you want to do - control it partway down, pop up to meet it as you let it speed up to get to your shoulders, and give with the ankles and knees to absorb the weight. That will save your shoulders and elbows.