Ah. Hate to say it but they've been withdrawn. UP retain one (6936) for heritage and occasional freight work.
Looking around on the net, I'll find out what they are.
Ok, locos on the video are (in order)
7454, 7419, 7462, the first mid train pair are 7800 and 5318, the second pair are 7792 and 7773 and the bankers are 7667 and 7680. Googling Union Pacific 7454 gives you this page
http://www.railpictures.net/viewphot...651&showexif=1
Follow through on Wikipedia with ES44AC gives you this
http://en.wikipedia.org/wiki/ES44AC#ES44AC and scrolling down to Evolution Series Operators will give you the UP numbers. They're all GE ES44ACs. Page doesn't give a weight for an ES44AC so a bit more looking around...
http://www.thedieselshop.us/Data%20ES44AC.HTML gives a weight of 432000 lbs which is 216 tons (196 tonnes)
My word, American stuff is heavy! Thought 269 tons sounded way over the top but for an 8 axle loco which the DD40AX was it has a lower axle loading than the ES44AC, 33 tons v 36 tons.