You'd be foolish to make any life changes as a result of this video alone.
Nutrition science is known as one of the biggest mind fields in science. For example, this chap is arguing the line that meat is bad for you, which there is some evidence base for. However, there is also an evidence base for the following claims:
1. Eating wheat to cause health problems in the majority of the population (something this guy advocates doing)
2. Eating meat alone in order to promote good health
Both of these contrary views have an evidence base, much like this video does. The only take-homes from this video are points you'd probably know already (i.e. don't eat too much fat). You need to do a lot more research to make even tentative conclusions in this field, let alone going vegan.