He addresses the disproval part: he didn't disprove their paper. He stated that just because it's below their threshold for sensitively doesn't mean it's super ultra mega sensitive, it just means that it's highly sensitive. 1.5 Joules is more than you think: a hammer tap could easily be less than that (lift a 100g weight a 1.5 meters off the floor: that's 1.5J of potential energy), however, as he puts it, that's still "sensitive as dicks". As for it blowing up in the mass spectrometer, that can happen if it started to decompose over time, accidental friction, accidental x-ray activation, too much in one spot, etc. I'm sure if he worked with the substance more than once or twice it's possible he'd have a random detonation or two. The paper and this video easily exist cooperatively rather than adversarially, and I think he was more calling out the science popularizers which exaggerated claims about it. In fact, he does nothing but mention things from the paper as being accurate.