I dont understand anything, what exactly is he trying to achieve?
I have no idea, looks like he's just messing with his gear.
It's interesting what he is doing. He recorded four chords, each on every channel and this for 10 minutes. The reason for that is to use the 4 track like an instrument, just what the header says. But why doing this? Well, you can get a very nice saturated sound by recording on tape. When you have clipping on digital level it's always bad, but on tape you can add some distortion/saturation and this is what he did. Guess it's more for audiophiles and for geeks and nerds, but a creative way