What Delvis said, plus:
-hips can be a little high on some reps
-grip too narrow, it looks like your arms are in front of your legs
-bar should be in contact with your body for all of the rep
Grip was something I was not sure on, will drop hips and widen grip in future.
Is that weight too light? In your setup, you don't appear to be tight and secure at all.
Make sure that you're pulling on the bar before you start, to take all the slack out of it and engage your lats. Think more about pushing through your feet rather than pulling. Also the bar shouldn't exactly be travelling upwards, it should almost be travelling upwards and backwards, which ensures that it's in contact with your body all the way up.
How do your hamstrings feel in your setup? Maybe try sinking your hips lower?
Yea the weight maybe too light but I was being cautious whilst tidying up form so wat do
I rewatched the video again and did notice my shoulders/upper back droop rather than being pulled back so will have to be more conscious of this for next time.