These videos are, of course, suspiciously cut to avoid showing all the times it completely fucked up, and still shows the engine completely fucking up.

• "This door requires a blue key" stays on screen forever
• the walls randomly get bullet damage for no reason
• the imp teleports around, getting lost in the warehouse brown
• the level geometry fucks up and morphs
• it has no idea how to apply damage floors
• enemies resurrect randomly because how do you train the model to know about arch-viles and/or Nightmare difficulty
• finally: it seems like they cannot die because I bet it was trained on demos of successful runs of levels and not the player dying.

The training data was definitely stolen from https://dsdarchive.com/, right?

it’s interesting that the only real “hallucination” I can see in the video pops up when the player shoots an enemy, which results in some blurry feedback animations

Well, good news for the author, it's time for him to replay doom because it's clearly been too long.