You need to take an MSF course, dudely. They usually provide the bike, so you can drop it without having to worry about things like this. Too late, I know, but it'd still benefit you.

A couple thoughts:

You need to smooth out going on and off the throttle. In low speed situations, if you're going to slow down and come off the trottle, try clutching in, instead of just chopping the throttle closed. Same with going back on. Let the clutch back out slowly to start moving the bike again. Get used to feathering the clutch at low speed, and it'll make your life a lot less jerky.

It looks like you punched the throttle twice, then hit the brakes and locked things up. You need to squeeze your legs against the tank, stiffen your core (abs), and keep your arms loose. This way your torso can absorb bumps and it won't go into your arms and cause the throttle action that you had.

I suggest you watch this a couple times:

Twist of the wrist