My two cents:
Your setup is kind of sloppy and you're lacking general tightness. Because of that, you're wobbling through the entire set balancing the weight, in stead of having it in a firm position.
As soon as you unrack the bar, your shoulders come out of their position. Pinch them together and retract them hard, and keep them there the entire time.
You're benchpressing very chest+shoulder heavy. Your elbows flare a ****load, which is a result of the above things. If you learn to keep them a little more tucked in (closer to your body), you're going to be in a stronger position and you can use your lats as springs to pop the bar up hard.
Add in some leg drive, together with the tucked in elbows and the added tightness, you'll be getting much closer to the bench press as a strong full body lift rather than the chest/shoulder press you're doing now (also easy to mess up your shoulders).
One last thing I see is you divebomb the bar down and then have to use a break and start pressing it up slowly. This also works against you. Controlling the bar down in a tight position and then using your lats as springs to pop it back up faster than it went down will work much more in your advantage.
All that being said, I'd get some advice from Cha/Aidan/BPA in here to get a 2nd opinion to make sure I'm on the right track.
This is a great place to start:
EliteFTS.com - So You Think You Can Bench