I did some preliminary checking: - I haven't interacted with Ultrakill content, potentially excluding some unrelated video essays but even then it's just background footage and shouldn't count - I'm not subscribed to this "Epic Acrylic" account (not that that would've mattered anyway because I don't get notified of all the videos from the channels I /am/ subscribed to) - It's not just pulling popular videos from a broad range of content (like Gaming), as this video has only 500 views. - I have gotten videos with low view counts as well, but they're usually Geometry Dash related and I watch a lot of those videos so those make more sense. Two things must be likely - either I accidentally clicked on a Ultrakill video when I was logged in sometime, or the algorithm is broken.