We have been allowed to capture the first level of the Xbox One X version of Rise of the Tomb Raider at the Xbox Showcase in London a few weeks ago. Here it is split into 4 videos, showing the 3 video modes in action: 4K enriched (Better textures and SSAO among others, non native), 4K native and 1080p 60 fps.
We try to show the difference a mode does by switching from one to the other during the video. There is no specific video for each mode.
Update 2: Added a second and final video reencoded to HEVC so you can watch it directly on your 4K TV.