What you're saying is nonsense. The video isn't actually meant for tenz directly. It never was. It was for the community to give them an actual idea of what's going wrong with Tenz's play and what he can/should do to improve and find more success overall on his team(He says as much near the start of the video). It might be obvious to an analyst/coach but it is not to the majority of community since they lack the ability(or willingness) to actually watch games from an analytical scope.
And since he's stating the obvious, he clearly does know what he's talking about.
The only person who has no idea what he's talking about is you.