A nice video, Connor, well done!
I'd guess that you're not one of the oldest in the forum..........

You sure seem to have a good grip on the guitar/amp/playing thing........

The only questions I would ask are, Is the guitar in your video being fed 'clean' into the amp or are you using effects in the line. If so, which effects/settings? Which pick ups are you using in the various parts of the video?
The line out feature, standard on most amps, seems quite adequate. Not sure why they have switched this to a mic level signal rather than line, but, so long as it works. Quite often, there are more line level inputs on a mixer than mic inputs, since good mic pre-amps add to the cost..........

Given the choice, I'd always rather mic the amp, to get the overtones/warmth that speakers tend to add to the sound. The amp/speaker combination being a large part of the guitarist's sound. But, sometimes that's just not possible.........
The 'sponge' thing is a useful feature. Basically, it's a power soak/attenuator/damper device.......... Jim Kelly was one of the first to built one into a guitar amp in 1978........

Again, nice video, a good description and good playing, well done!