Michelin power race tyres is a brand, not specifically meaning they're racing tyres. They are a track/road tyre and they're very good for reference.
1) unlikley.
2) No, but he does increase his chances of a lowside by doing so.
3) No, there is race lap time performance to be had by doing this, braking later into the turn and carrying more into the turn, but also see point 2. He wouldn't (well shouldn't), be braking all the way through the turn, that's completely uneccesary, you either brake, or use the throttle, not both to my mind.
4)Yes, that's right, the application of throttle does transfer the weight, though you can (and I don't reccomend it any beginner/moderate level), to brake into the turns (see point 2). What in essence happens, is the rider leverages the exceptional grip levels of the modern tyres and gets away with it. and thus thinks its something you can/should do.#
The reality if using the brakes with the bike leaned over is possible, though if you look at top level riders, as they increase lean angle, the brake lever pressure decreases. So lots of brake straight upright, and release pressure from turn point into the turn. How far you can go into the turn depends on the type of turn, how the bike is setup, the grip you have and so on. Reccomended. Not until it's really becoming your limiting factor to going really fast, No.
Bullet
Ok, I am with you on the tire question. It's a trade name, not a race tire.
And now for some other clarifications. I can be anal at times, don't take it as me being cheeky.
1) Which is unlikely? Riding to the limits or mimicking the pros?
3) I understand braking later will help lap times. He is dong this throughout the turn.