I've been playing RPGs since I was 12, but I sat still and watched all twenty-four minutes of this last night:
I think this video rules. Because I've been in the hobby for >50% of my life, I forgot how many assumptions, unspoken agreements, implicit social contracts, and tactic best practices there were. I bet it is confusing to be a good new player. If and when I ever game with someone new, I am definitely going to show them this video. And as I write, even if I'm not writing for a "new" audience, I need to be aware of the things that I am not saying.
"There as many ways to play D&D as people playing it."
Too true. Too true.