1) Very cool that the devs help us get good demo footage.
2) Suddenly feel a lot more tempted by the engineer, I like the range-changing skills. You really get an idea of class flexibility in this video.
3) Underwater will never get old (though would be nice to see more than one area)
Edit to add: I know release date stuff is getting boring, but "we'll be having beta in the ne-". "near future", or "new year"? Or just a mistake not meaning anything?