It is really hard to give you any advice from that angle. Speed is fine, but it does look like your hips come up a bit fast and IMO your stance is far too wide.
If you can, narrow your stance and post a video from about 45 degrees (front).
For the stance, set up to take a huge leap. You'll naturally and intuitively get into the best position for you. That's your deadlift stance, keeping your toes pointed slightly out. Keep your knees out too, and push your knees out hard as you push off the floor and beging pulling.