12
Radiation destroys cameras, like literally just punches holes in the sensors they use and quickly creates permanent damage. If it was passively radioactive enough to be damaging he'd have fucked his camera up getting close to it to begin with, and a spike in radiation (from poking the end with a battery powered hand drill for a few seconds? He doesn't punch through it, probably didn't even get to the depth of the engravings) intense enough to just kill a guy outright would fry the camera in a very recognizable way. The really dangerous shit that gets stored in (smaller and made of lead) capsules is on the order of "makes you very sick and guarantees eventual death over the following days or weeks", there's nothing that's going to be contained by a thin layer of steel but immediately released in immediately deadly doses with a slightly thinner layer that's not even as thin as where its already engraved. Also that stuff makes the news when it shows up and kills people after someone scavenges it, because everyone likes making a big show of this scary dangerous stuff for ratings and clout.
Then there's the fact that he immediately turns the camera away when he stops drilling (note there's no sound change before he stops, it never pushes in at all, and it doesn't jerk like it punched through into a cavity) to show a blue light that's the same color as the one mounted on the drill and seems to be mounted on top of an object that's hidden by the lighting but looks like a rack or stepladder or the like (seeing the before/after screenshots, it's a flashlight someone set on the corner of the whatever that is, which has further been turned and propped up by a tub), and then is very careful to fall in a way that covers the camera completely and despite then making sounds that vaguely imply thrashing around at no point lets even a little bit of light touch the camera. As soon as it goes black like that it would be trivial to have the video feed switched to an already recorded piece for the rest, or even just have whoever placed and turned on the flashlight for him switch what the audio feed is using the streaming software or an audio manager like voicemeeter, enabling him to simply move and set up the rest with the lens covered without giving away audio tells. If that switchover happened during a noise or was additive by introducing a loud noise as the original stream got muted, it would be very hard to pick up on even with close analysis.
Conclusion: high effort low budget performance art project.