It kind of confuses me why devs release these videos instead of demos in general, This part of the game (if I had watched it, instead of skipping major parts to only see snippits) would be pre-spoilt. This of course in a long line of companies who can't shut up about a game until it launches making sure you know every twist, turn, secret, ability, leveling system, Hidden endgame unlocks,bonuses etc.
It's almost as bad as movie trailers that use the best of the best parts of the film to show it off, completely dampening any epicness it could have had.
It is like the Battle Los Angeles trailer...
When you see jittery shots of them trying to get the kids on the evac helo and it gets taken out midair , Then you watch the film and any shock or surprise the scene where they load the wounded on the evac chopper is completely removed because you are sitting there for five minutes going, that chopper gets blown up I know that, I know A lot
Just don't watch? They Tease and tease for months up until release, it is ridiculous.