For technical reasons (limitations of NIPR computers while deployed) I can't watch the video in question. One of the first LiamENGL videos posted we was just testing his new BKP Warpig, and I'm pretty sure he said it was an Alnico V. He plugs straight into an OD808 and then the 5150. That video is when I first heard BKP tone (that I am aware of!) and I was on a hunt for an EMG substitute that was more organic, high as hell output, and huge bottom end. I found an Alnico V Warpig on Ebay and the rest is history. I was sold and have been swapping out every guitar with BKPs.
I like the Warpig for melodeath, metalcore, etc. There may be technically better choices (MM) but the tone I have dialed in, the my amp, works for me.