Yikes; DF's full written analysis is live, and while they're not positive due to the temporal reconstruction and effects in play, they think they've recorded the Xbox One version falling to 480p. 0_0

http://www.eurogamer.net/articles/digitalfoundry-2016-titanfall-2-face-off

Did you watch the second video in the OP? When they are stress testing the X1 version in the valley the background rock face looks like launch games from the X360 in terms of details... still 60fps but holy heck that is some crazy drop of resolution alright.

That said, they were stressing the game out to the max and it wouldn't be what you encounter in normal every day gameplay of the title.

This point in the video https://youtu.be/bGxMQlEkFQs?t=5m10s

Well if it was only 400 at launch i would call it cheap, but it was 400 + online (300 + online now) if you want to take full advantage of many games, so actually it isn't that cheap.