Honestly your form is pretty bad, not absolutely horrific, but pretty bad.
1. Bring your feet in to shoulder width or slightly narrower.
2. Flatten your back throughout the whole exercise.
3. Keep the bar closer to your body (it should barely clear on the way up)
4. You aren't using your shoulders/traps at all to drive the weight.
5. You are shortening your pull/trying to muscle it up instead of clean it.
6. Catch the weight with your legs and not your back (don't lean back when you catch the weight).
7. Bring your elbows in during the catch.
Cheers,
Scotsman