That's a decent video. Most experienced shooters have likely learned it for themselves. For instance, when my daughter asks me to take her in the back yard to shoot, I try my hardest to not over criticize her, but her stance and overall posture is just ... ... incorrect.
I understand what UniversalFrost is saying though too. With more experience I'm sure she will learn it for herself like I did. She gets upset with herself when she's not plinking the target, but she's 10 yrs old, I'm proud of her, and I don't want to give her any excuse to be discouraged.
Older people NEED to learn how to shoot correctly and SHOULDN"T be offended by negative criticism. Everyone should follow their gut instinct though (in my opinion) and if what works best for them ... more power to em.