Hi there
Your 110x5 deadlift looks pretty good from here - back is nice and flat, there's no arch and you don't lose that shape on the ascent. If I had one comment to make it looks a bit like you are a bit hesitant with it. Lock your lats in place as you set-up and then drive like crazy through your heels. The lift was pretty quick was it was, but a bit more speed off the floor and you will be golden.
Also your finish looks a bit weak, squeeze those glutes some more. I recommend doing some glute bridges with a barbell or some 1-leg hip thrusters. Good luck!