Well i find day scene is 4k.I am sorry, but that's simply not true, not from that footage. I pixel counted one image happening during night and now 3 images happening during day. They are all around 1440p. My opinion is that as far as I can tell from this footage, this game is locked 1440p without any dynamic resolution. Here are 2 new images I have looked at:
This one was quite difficult I estimate it at around 1400p (because of the very low quality, but it's most probably 1440p like the others).