All of the battle system footage was real, You can't teleport infinitely. There is a teleport gauge down at the HP location. Every time he teleports the bar decreases. And the teamwork is not something you can do by yourself, At the behemoth scene you could see that whoever was playing for the trailer was luring him to do a attack so the teamwork thing could start.
Nomura is awesome man and I have faith in him. I call nothing is BS in this footage.