Yeah dude I hate to agree but your form is really not too good. You are lifting almost entirely with your lower back, letting it round a ton, using almost no legs and no hips at all because, as ahnz said, you didn't squeeze your hips through to finish the rep.
My advice is to drop the weight WAY back, like 50% of what you were using in that video. Work with the light weight for a while, like a couple months, focusing on pulling with perfect technique and speed. In order to figure out what perfect technique means, go watch as many videos of big deadlifts as you can, read articles, watch instructional videos, etc. you need to learn what a good deadlift looks like. Then, film yourself and keep your technique good, until you figure out what a good deadlift feels like. Then, drill that motor pattern, over and over, with lighter weight until you're proficient at it. Be patient and work hard, you are going to be a LOT weaker with good technique for a while, but don't let that frustrate you. Check your ego now, and you will get better in the long run. If you don't work on fixing your pull and keep pushing heavy though, injuries are right around the corner