Weird hypnotising glitch?

Hey,

So i was just doomscrolling tiktok and I came across a simple enough video. It was a lady learning English, ive seen her videos before and they've always been non-eventful.

It was normal for a second or so and then suddenly the screen split into 3rds (vertical). So the top third the video continued playing normally (although cut off so it was just her forehead), the middle third contained an animation. It was a black screen with rows of multicoloured dots spinning in a circle (kinda how you would imagine hypnosis) and the bottom third was a static photograph of what looked to be the side of an old stone building, looked british possibly even a church but not sure.

I thought it was someone uploading a weird video so I opened the comments and as the comments came up the video started playing normally again. No one in the comments was mentioning it. When i closed the comments it continued the weird stuff it was doing before.

I then thought maybe a weird glitch so I scrolled up and down multiple times, reopened the comments and closed them again but it was still doing it.

At this point I was weirded out so I called my husband over and showed him. He saw it for a few seconds and then it just disappeared. It was like it knew I was showing someone.

I know it sounds crazy and it probably was just some weird glitch but it felt like some subliminal hypnotising or something 😂

Has anyone else experienced this?