Ditto on the video. What you think you're doing is often not what you are actually doing.
Also, try shooting just one arrow. Shoot, walk up and and pull, shoot again, repeat. This helps simulate the "first shot counts" for hunting. For me, it also helps prevent fatigue and lack of focus which may come from shooting a set arrows. It takes the focus off of "shooting tight groups," and puts it back on hitting that one spot the first time, every time.
I don't know how many times I've looked at the target, and there's 5 arrows with feathers all touching right in the ring. But there's one that's way off to the upper right. I think to myself: "well, that's good shooting, nevermind that one winger." Well, what if that winger is the one shot at a deer?
Not to say that trying to shoot groups is always bad, but if you're concerned about hunting, I think focusing on the one first shot is more helpful.