I'm going to give the researchers the benefit of the doubt and assume that by "shifted away from a weight-normative mindset, adopting a weight-inclusive approach to teaching dietetics" they mean that diets should be specifically tailored according to the individual. A 25 year old athletic man who's 6'8" will require a vastly different diet from a 5'1" 60 year old woman even if they're both the same BMI. Many of these videos push a one-size-fits-all approach which won't work for everyone.