https://www.youtube.com/watch?v=wyu8v10PIK8
There’s some interesting stuff in the TV spots.
Seems like a couple exchanges from the hangar convo at the beginning of the 3rd act are placed elsewhere. K2 says he’ll help because the captain told him to while they’re on the U-Wing (though this could be misleading as K2 lines are easy to rearrange). Caspian says he couldn’t face himself if he gave up now on a ship (probably the Imperial cargo ship) while all wet, presumably after the Eadu sequence. What’s tough with trailers/teasers is they so often mislead by putting shots/scenes together to seem like one. But even still there’s other stuff like Cassian saying “this is a first for me” on the streets of Jedha in the teaser where in the film he says it in Saw’s jail cell.
The other interesting bit is Jyn saying “welcome to Rogue One” in the same shot as “may the Force be with us.” Which might imply that the callsign isn’t a last minute thing (and maybe their mission was sanctioned) though not necessarily.