Don't get me wrong, I want to believe (tm) as much as anyone, but this particular part of the story has a lot working against it:

* This person is anonymous (account created in Apr 2023), so we don't know anything about their affiliation or credentials.

* They do seem to have good knowledge of materials science (although I have no way to judge), but the rest of their twitter history, which is all we have to go on, doesn't inspire confidence.

* This person decided to replicate this experiment on a whim, as a distraction (because they couldn't stream a movie that night, according their tweets), while serious labs around the world have been trying frantically for several days, without any results.

* This person refuses to submit a video ("bad tone") or any additional footage of their achievement, despite it being the most unique and world-changing compound on the planet.