I believe that was taken from a long video where Henry Kaiser talks about his effects processors, guitars and Dumble amplifies plus his musical influences. He must be independently wealthy because those are the most expensive guitar amps in the world (can go for over $100,000) and the builder is a weird eccentric who only builds a few amps a year for certain people. He even has Alexander Dumble in the video talking some mystical pseudo scientific Bullshit about tube amps. It's pretty funny because most people on YouTube hate this auto biographical documentary/instructional video/ what ever because of the really harsh and fucked up pitch bends he creates with his mountain of harmonizers and digital effects.

Here's some more of these weirdos in a band setting






^ Drumbo (French) sings here too, great voice but audio is a bit fucked up