The tapping in the soundtrack of that is the Havana Syndrome Weapon being deployed on that anon, and the impulses from it are interacting with the charged capacitor plates of the microphone, making them jump, and register those taps.
The anon who made that is being beamed by their surveillance team, probably from a house nearby.
I too have seen the application of a fair amount of force in the house move stuff, done through the walls from the neighbor's; They never bothered to keep the public up on the toys they were developing to deal with dissidents.
God Bless you anon, and keep you safe.
They use it a lot more than you think. The anon who recorded that video likely has no idea, all they know is they wake up groggy each day, and their energy is down, and they get confused sometimes. But they will blow it off as getting old, and never look further into it.
They use those weapons a lot, but nobody knows, because unless you are running a microphone and know what to listen for, nobody will have any idea what happened. There is no cost or even risk to it.
I beleive every neighborhood crew has that device, because it is an important tool for mapping interiors without entering residences. I think the use as a weapon is off-label with special settings it was not ostensibly designed for.
But as you see, it is so common you see it the one time an anon records a TV show with his cell phone mic.
I have used spectrum analyzers, both a Tiny SA and the EMF-390. As swept spectrum analyzers, neither, after extensive use registered what freqs were involved if any.
Tiny SA only goes up to 20Ghz though, so iif it is over that, or the pulse is short enough it will miss it. The EMF 390 does not detect or register anything, unless in rf browser mode, in which case it will peg out at over 33w/m2. I called the engineer who made it, and he said the older model had a seonsor which saturated at 74w/m2, and he was getting calls from targets saying it pegged.
For some reason though, in spec analysis mode, it does not pick up anything unusual in any freq range it offers, outside of a -10db signal at 450mhz.