See I really don't like those types of videos. I don't want to discourage you from posting them or anything (because at this point we're scraping the bottom of the barrel XD) but you don't know if they've already watched it and planned their reaction.
More importantly, the fact that they KNOW a FFVII remake is happening before watching it totally ruins it. The joy is the realisation, and that doesn't exist in these videos where people are just recording themselves watching the trailer. It's still cool to see people reacting to the small recognisable elements in the trailer, but it's people who are recognising things unaware that it's definitely a remake trailer that is really the best to watch (IMO).
A big part of why I feel this way is the way the trailer was shot. It was very much planned as a "what is this!? no no no no no no noOMG OMG OMG" announcement trailer. Having the knowledge and opening the thing on YouTube is not the same.
Into the bargain, I find these kind of annoying because the person has gone "look how many views these reaction vids are getting" and popping one up. I've seen "I'm reacting to this trailer" ones where they're not even a VII fan, it's kinda ridiculous.
Really sorry Animexcel, I don't mean to shit all over your post. I just don't like those videos XD.
EDIT: Has this one been posted yet? (Probably, too lazy to check)