I counted 7 or 8 seconds of the tail dragging the runway. Several things could cause that. Load planning mis computing payload, crew screwing up v speed calculations, flying pilot rotated too soon, others I can’t think of right now.
Local talk show media is making a mountain out of a molehill out of this. They do that with every aviation related story that comes across their newsfeed.
I agree with this. Until you know for sure which direction to take it will most likely be counterproductive to do much studying. The caveat to this is if the company you work for has provided some guidance as to what you should study.
Don’t get ahead of yourself.