His sheer enthusiasm in this video is incredible. Also the glee when he adds 666 to the music lol (or maybe it was a pentagram, or both? Been a while since I watched).
The spectrogram stuff you're referencing was one of my favorite parts, and also the description of his crazy array of pedals he used to get the signature sound.
Gordon's YouTube channel is amazing. His videos about creating the sound of DOOM (2016) are stuck in my head very strongly. The guy clearly is extremely passionate about his work, and he loves going into the nitty gritty of the process.
His very short video about the old soviet hardware synth he managed to find and pretty much had to reverse-engineer to make use of was very memorable[0].
