Did two rounds to warm up before lifting. Will be posting more after getting some pointers. So please comment on not only the technique but what I should be doing more when working the bag.
There are several ways to use a heavy bag, and NO, contrary to sherdog belief you don't always have to simulate a fight on the heavy bag. You can work a specific technique using the bag for feedback, you can work inside on uppercuts and hooks and pivot around the bag, you can work outside with your long punches moving around as the bag swings. You can work on bumps and hitting the bag on the way in, you can add in defense to maintain good habit or if you're working only on the offensive technique you don't have to. Working defense is best done with a person anyway.
To be honest, you're just working the bag to me. Typical training session. But if you want a little constructive advice on tech...I'll give you my perspective on a couple things.
Round 1:
The thing that sticks out for me in general here...is that you're a little stiff. I think part of the reason the video gives off this perception is because you stand very tall for just boxing. It also implies that you're not getting power from the ground, which means you're missing out on power that you COULD be using. Sit a little more and move your body a bit. Flow...
In this forum, most of us tend to advocate a rear weight bias unless you're specifically shifting weight forward for a specific type of punch. So of course the recommendation is going to be that.
Jabs in general are done off the rear weight bias, unless you're using more of a power jab where the weight goes to the front foot a bit more. However you have to be careful to not let your head go forward on it because if they catch it they'll be more easily able to counter punch you. You actually tilt your entire centerline forward...which isn't good either IMO. You chicken wing your jabs too...actually both your arms do this. Keep your body upright, chin down. Don't hop on the punch. Keep the elbows tight and relax your traps and shoulders. I can literally see your traps tighten up.
Your ducking and slipping at times goes a little too far beyond the balance point. Keep your lower body under your upper body. Widen the stance a bit. You don't want your head going past your support structure to the point where you're either off balance or easily off-balanced by your opponent.
Round 2:
On the cross, don't lean forward, just rotate. What you're doing is standing tall, and rolling into your cross throwing it downward and leaning over into it. You WILL go off balance if you throw that with heat and miss. So just rotate the hip and sit a bit on it, this way your head stays upright and you still get a powerful cross and don't end up off balance if you miss. The duck afterwards should be just as balanced, with your stance supporting you and giving you the ability to move back out or pivot out to your left, or weave back to the right.
You rise up on your body hooks. Literally, your body rises up. Sit DOWN on your punches, don't rise on your toes, but I like the bobbing you put in between them. Don't forget also to keep your chin down, sir.
....
Overall...it's not as bad as some folks make it out to be. I've seen far worse. You're at least functional and like anyone else on this board, just have stuff to work on.