From the sticky on posting videos:
DEADLIFT
1) Show your set-up. Show your set-up. SHOW YOUR FUCKING SET-UP.
2) Best if filmed from the side or the front quarter. We need to see where you put your feet / hands / knees, and this can be done from a high side-shot.
TomC: Make sure that your head and feet are in the frame at all times. This means you may have to back up a good way from whoever is lifting.
3) We need to see the entire bar path. That means we need to see the close end of the bar for the entire range of the rep.
4) Show your set-up.
I'm not a coach so take this with a grain of salt.
I don't see any indication of lifting the chest and tightening up the back before making the pull. Try looking a bit farther in front of you.
What's with the hitch coming down? On the way down, bend at the hips first and then when the bar is past the knees, you can bend them to put the bar the rest to the way down. As long as the bar's descent is controlled, it can be rapid.
Any other comments will have to wait for a more informative video.
-RJP