Interesting take on using effects pedals. A lot of guys are using that Intramic which is a little water resistant mic that you put IN the neck of the sax, but non-destructively. A lot of horns in the 70s, they drilled out a hole in the neck and put in a pickup.
Why you’d want that? Prevents feedback, and bleed from other instruments. You learn more about it here, and check out HornFX’s YouTube channel to see him use it.
Anyhow, I’m not sure I like this pedals used in this video. Not really my cup of tea, but it’s interesting none the less.