I think are are some things about form that are critical for hunting. There are other form considerations for target shooters that I think can be a detriment to a hunter.

TFOX, like you said, draw length is very important. It's too bad that most hunters have this at a less than optimal position. This really comes into play when turning to your extreme right or left (much farther than you turned in your video). I agree with Len, that your draw length seems a tad long for hunting. I too shoot with a straight bow arm, but I find a shorter draw length especially beneficial when I'm twisted to my far right, shooting from a tree stand. A shorter draw length also helps keep the string from hitting clothing. This may not be optimal for a target shooter, but a hunter will benefit from it quite often. That said, if your's works and you're not missing opportunities, then it's right for you.

Hand position on the grip is also very important. I've seen far too many beginners have serious trouble with the string hitting their arm, even when shooting the correct draw length. This can often be traced to the grip and elbow position. It's good to learn this properly. Yours appears to be very good for hunting.

I put an even greater emphasis on anchors than most target shooters. Most use a peep which aids in getting the anchor correct. I hunt without a peep, because I can acquire my target much faster and be in position to shoot sooner. I'm positive that I've taken several big game animals because I didn't use a peep. A lot of practice and experimentation with anchors is necessary when not using a peep. This is why I'm not too keen on changing bows frequently. It takes me quite awhile to dial in a good set of anchors unless the ata, limb angles and draw length are exactly the same. The great thing about getting these great anchors is that at the moment of truth, I don't have to think about anything. No centering a sight pin or sight bracket - just shoot.

Target shooters spend a lot of time repeating their pre-shot routine until it's second nature. The problem in hunting is, that you usually can't do most of this stuff. Your stance will vary, you'll be forced to lean, balance with be off and you may even have to cant the bow. The shot will be offered for a varied length of time and unless you want to miss opportunities, you have to ready to shoot quickly.

Target shooters put a lot of emphasis on being properly balanced. As a hunter, I pay no attention to it all, except to practice a lot where my balance is anything but good. I've taken shots standing on one foot, leaning out from my treestand with only my harness holding me in - I also practice this quite a bit. Some friends of mine and myself often engage is a kind archery "horse" game. We do this on a course that has several treestands. The first guy makes up an unusal shot and everyone else has to take it. Closest to the center leads off on the next shot. The one furthest away gets a letter. When you get "horse" you're out unless you can hit the bullseye on an 80 yard shot (usually we don't). You would not believe the shots we practice. I've learned very well where my shots go when I cant the bow or my balance is so far off I'm about to fall.

So, yes I believe form is important, but I firmly believe it's even more important to a hunter's success, to practice varied hunting situations. Practicing what would be considered poor form can be very beneficial when pursuing a moving, thinking animal.