That's a 13 year old video.
These days, everyone is downsizing their rigs, or going completely amp-less in a lot of venues, so realistically, this would only be useful for getting your impedance to match up with your power amp.
Fortunately, I own a bunch of split-stack cabs, so I can use them in series or parallel as needed. Even so, there's no place around here I can use those unless I invest in a couple of 20-watt rack mounted power amps, then maybe that might be an acceptable power level in the few places that still have live bands around here.
That's why I've been experimenting with building pedal boards that can be used with, or without amplifiers. I'm trying to see if I can re-create that magic tone and feel going direct into my DAW. So far, my efforts have been less than inspiring. I'll continue this topic in a more appropriate thread.
Harley