i watched your tutorial and i have a few suggestions.
- there's nothing wrong with a rounded upper back. in fact, it limits the ROM and allows for more weight lifted. the lower back shouldn't round but the upper back can. many of the stronger deadlifters will round the upper back.
***There should be emphasis on aiming to keep the back in a full arch IMO. I believe the reason why many stronger deadlifters can't hold a full bottom to top arch is because they can pull more than their upper back can contract against. Make sense?
I fully believe that it's a good idea to keep scapular retraction in mind while deadlifting.***
- you should emphasize the need to shift the weight to your heels. it's a pull not a "pick up". you should pull the weight back into the shins and then the bar should ride up the legs. a strong deadlift is all about leverage. start the lift with the weight on the heels. pull the weight back and then the hips forward to the bar.
I was thinking I made it clear that the weight was on my heels, as I mentioned that specifically in the video. I did not talk about pulling back though, so thanks for the suggestion there.
- IMO, the breath should be taken at the top while the body is upright. it's very hard to take the breath into the belly while you are bent over.
I agree, and I made that clear in the video. I specifically mentioned taking the new breath in the standing position, not the bent over position. Do you feel that I made the impression to breathe at the bottom of the lift?
- spend more time on the setup. take a breath, set your hand and then leverage yourself to the bar. don't just passively drop to the bar. one of the best things i ever did was to learn to pull myself down to the bar. doing so puts me in the perfect spot to pull. if you just drop down there's no telling where the hips should start. if you pull yourself down to the bar while while putting yourself back on your heels you will always start with your hips in the proper position. when watching someone pull and their hips rise first it's usually becuase they didn't pull themselves down to the bar. they aren't tight.
just a couple thoughts off the top of my head.