your lower back is rounding badly. It should not be arched, but perfectly straight with everything tight. Upper back can round a little, but that looked painful to me.
Also, looks like you are pulling the bar forward slightly to avoid your knees, then pulling back at the end. If you get your butt deeper and back, it will get your knees out of the way.
Yep, it's some weird hybrid between SLDL and deads, but not a good version of either one, you're risking potential back injury.
Have you ever read Delavier's "Strength Training Anatomy?" Read his description of a deadlift, really clear ... or check this, again VERY detailed explanation of DL and SLDL:
You need to maintain the natural lordotic curve whichever exercise you're going to do. Rounding out the lower back is just begging for disc herniation.
Aside from the awfully rounded back (which has been mentioned) you begin by straightening the knee but don't actually move the weight off the floor. Your quads aren't doing much lifting at all, and your spine is taking on some nasty uneven stress, without any support from the erectors.
You have to work on getting the muscles in your torso tight, move into position and squeeze the bar off the floor nice and slow to begin with.
Chest up and butt a little lower, hold and squeeze- raising the chest & hips at the same time.