Another really good sounding demo. The video opens with Green Day style riffs but the rest of it starting at 1:16 onwards shows mostly just standard guitar tones.
Sounds like somebody split the difference between a Plexi and 800, and put more gain on tap, which doesn't sag quite as much as a stock plexi. But the gain is still pretty gnarly and uncontrolled in a cool way. It doesn't sound overly produced out of the box like a lot of amps do. It's a proper raw Marshall.
Sounds like a great rock amp to me. ¯\_(ツ)_/¯