Well graphically it is obviously in ffx, and the one i like in it the most would have to be a choice between 2, when they all slide down the cables to the bevelle wedding. Or the starting blitzball fmv with sin and all that.

but my memories lie in ff7 when all the weapons get released from the northern crator i think it was. that was awesome! You hardly ever see more than 1 huge monster at a time in an FMV!