This is the best summary I could come up with:

The original poster of one of the Billibilli videos circulating on the Internet and seemingly proving LK-99’s levitation ability has come forward, and admitted his clip was a hoax.

The video in question is allegedly from the University of Science and Technology in Beijing and purports to show a small black substance floating in the air as it follows a magnet.

Whenever a claim as momentous and potentially civilization-changing such as “we’ve found the world’s first room-temperature superconductor” is made, noise is bound to follow.

But even focusing on the hard science (which we want to be clear, replicable, and truthful) and moving on to the boundaries of peer-review scientific process, it becomes difficult to deal with the noise.

Neither the cooking time (how long at what temperatures the mixtures have to stay within a vacuum oven for LK-99 to be synthesized and whether there’s thermal variation at any moment) nor the quench rate (the same, but when it needs to cool down) are, however, well-documented.

The video poster ultimately claimed that the experience of being a part of the noise had changed him, and that he’d be more cautious with his actions and words in the future.

I’m a bot and I’m open source!

deleted by creator

I was wondering about that when sensationalist science Youtubers started spreading the footage like wildfire.