your punches are so wild! i didn't see man jabs just a lot of wild throw punches hitting the bag. they had a lot of power behind them but remember in a fight you're not going to throw all haymakers or you will punch yourself out. Also, i don't know if you had your wrists taped underneath those gloves but try that. you can hurt your wrists while doing that kinda stuff if you don't tape up. I couldn't see your feet so i don't know how to tell you about those. i just do a nice boxing stance with my left foot forward and right back.. right foot the heel is off the ground and the direction you step i lead with that foot and slide the other. (move forward left step right slide, move backward right step left slide, move to the right right step left slide and you can get the left:P) drop you chin and lift your shoulders more. I didn't see many kicks, i have the same problem, when i'm going on the bag i don't throw many kicks and i have been trying to break that but it's hard. Also, quit swinging your head. i would love to fight somebody who did that they'd swing their head right into my punch bringing more force behind the punch. You have a lot of power but control it. To practice keeping your chin down for about a week of bag training put a towel under your chin and hold it there. it will help a lot. also, this is off topic but you weight 144?? you looked like you weighed more then that to me lol. Sorry for the lack of structure of my post and stuff like that but i hope you can take some to heart. good luck whenever you fight and remember KEEP YOUR CHIN DOWN AND SHOULDERS UP!!!!