Help finding weird topic

Hey! After the recent Iceberg video, I wanted to recommend a topic that may be interesting to investigate, but can't find the name of it. I was reminded of it by the raillights.

A kid in my extended family had these YouTube shorts on, with the following pattern: each video was named with a number, and consisted of a building-like character dancing by itself. After a couple seconds of looping music, it would flash, the music would change into a lower pitch, and the character would transform into something nasty. It became a zombie version of itself, it had snot all over it, it became bruised, or bled, or something.

I know it's not the most distressing thing a kid might find online, but it was weird in a similar way to the raillights and it might make for a cool video of there's more to the genre. At the very least, I'd love to be able to find it to show people.

Does this sound familiar to anyone? If there's a group of people that might know this, it's Frankie's audience.