I don't know a single federation that doesn't allow belts in its raw division. If you're not competing, and you don't care about the increased capacity for heavy lifting while still very much remaining a raw lifter, then there's no need to consider a belt I guess. I think it has value for training purposes, but to each his own.
As for your form, I think the extreme jerking at the elbow joint is detrimental, and in the long run will likely be very taxing. My guess is you haven't been lifting for very many years. I'm 31 years old, and I can assure you, this technique is not something you will be incorporating at my age. More importantly though, it reveals that you're favoring aggression over tension in your set up. I think you should have both in order to pull optimally. I believe you can get more speed off the floor if you begin your pull with extended arms. Just something to think about. You can still be very aggressive initiating the pull... this just isn't the best way to do it.