Guiness, the first time I watched I didn't notice the heels coming up, the heels on the o-lifting shoes may have made it seem not too noticeable, but I have to admitt I missed it. I agree with Madcow on that, it is something you cannot do.....the good thing is I find that is easy to correct, next time, consciously plaster those heels into the ground and don't let them come up, this shouldn't require much work to fix because you'll feel much stronger with the heels firmly planted and will just do it naturally from that point.
Again, I truly feel the rotation thing is so minor it isn't worth worrying about. Here is a good example of the textbook form that makes you a geeky technical lifter and the solid form that allows you to push yourself. Watch Brad Gillingham or Benedict Magnusson deadlift, they have excellent, tight form, but if you really want to nitpick, you can find flaws and breakdowns. These 'flaws' so to speak are not pronounced and will not foster an injury and are just natural bodily adjustments when straining. Next, watch John Basedow in "Fitness made Simple" lol.....you cannot find one flaw in ANYTHING he does, he is a dorky technical lifter who is weak. I just feel that the rotation in your video is minor and will not cause problems so long as it doesn't get more dramatic as you up the weight, I think it won't be a problem and you can safely and worry free continue to get stronger......rather than freak out about every minor little thing, and thus stay the same strength while banging your head off the wall.
I do want to add, you're doing a hell of a job. The journal is looking good and the #'s are really moving.