OK, a couple of things. #1 first and foremost, read the
pulling sticky at the top of the forum. It was written
just for you!
2) Read the "
Welcome to the Staff Q&A Forum" sticky, specifically the links to filming form checks in #3. Your dark pants make it very difficult to see what's what. The lines on them, as an aside, don't help.
3) You posted 1 rep. It's hard to see patterns from 1 rep. Post a set of 5.
4) We don't grade sumo deadlifts. Or at least I don't. I don't see anything about your anthropometry that would keep you from deadlifting normally.
Send us some normal pulls using the set-up method discussed in the pulling sticky.