You can’t just make a cool video and expect it to get people interested in the book.
Nobody is born being able to critique well. You have to learn from doing it. Guidelines can help.
As my first blog post here, I tip my hand about what gets my goat as an editor of fiction: words of wisdom, usually tossed out at writers by other writers, claiming some thing or other is “against the rules” when that thing is actually just a matter of choice—of authorial style.