Consider these things. When I record, I've found through testing that the cleanest tone / signal (at least with my gear) happens when the peaks are around 100 dB. Not loud at all. Also, the wattage of the amp while it's huge in the room, not really a big deal on the mic. It's there, but not significant.
When we gig, all the stages are micing the cab these days and we actually play live quieter than we rehearse in my garage, where we'll regularly be 110-115dB peaks. Maybe 105 on stage?
So the loudest I regularly play is jamming at home or band rehearsal. With the big power section amps I'm not playing any different volumes than with the smaller amps, however the difference in the movement of air & the girth of the sound is immense. There, the Coli is the ultimate bedroom amp! Ha!
On the wood plank guitar video- this guy & that other guy are showing us that on the close mic, the speaker is the only thing that makes a significant difference with maybe the amp making a modest difference. Everything else either doesn't matter or could be normalized with EQ / gain changes pretty easily. These things are quantifiable.
The hard part is that we haven't come up with a good way to quantify what human ears hear in the room. I've been thinking about this lately and the best I can come up with is a parallel between fluid dynamics with pressure & flow. They are related, but not the same thing, and both can be measured. However in the sound world while we can measure recorded noises, I do not believe we have a good way (or no one has tried) to record the movement of air and that to me is the third dimension that could explain the reasoning behind what we experience "in the room" vs. what we can record on a microphone.
For example, one night at band practice I set up a Coli and then set up a Helix direct. Both were dialed to the same volume. The band guys & I all agreed that the Helix, even though the tone was decent, was thin & weak, while the Coli was full & powerful. At the same dB it simply moved more air which made it easier to hear & clearer in the mix.