Every single thing in the game play, visually, was straight from DOOM 3. A little extra polish on the models, but that's it. Also, that video was likely the first 6 minutes of the game, which was faster paced in DOOM 3 too.
We don't have enough info to know that we won't see the horror story element, "hallway crawler with the flashlight", in this game too.
Go watch the video with your eyes open this time. One easy copied assets to spot is the plasma gun. Here's the DOOM 3 version for reference.
The new one has a higher polygon count, but they reused the same base asset from more than a decade ago. Which, again, would be fine for a sequel being made a couple years after the previous one, but this is supposed to be a franchise reboot.