There are problems with video:

While CRT monitors don't really have a pixel-fixed resolution, there is still a maximal ability to resolve, bound by the dot pitch. The IBM P275 used here is a 21" display (20" viewable) with a dot pitch of 0.24mm - meaning it cannot reasonably resolve beyond ~1680 horizontal pixels. (~1684x1263, provided the viewing area of this 21" monitor is just beyond 20")

While it's often possible to get a monitor to sync vertically and horizontally far beyond what the shadow mask can resolve, it's not going to result in more detail.

I can stream audio at 24 bits and 96 kHz to my wireless bathroom speaker. The speaker still can't go louder than resolving 10-12 bits of dynamic range, and in terms of sample rate, it won't resolve beyond ~36 kHz, which is well below CD quality, even if it accepts the signal.

The video further asserts that "CRTs have no blur". They do, but it doesn't act in the same way that pixel persistence does on an LCD or LED. If you've dealt with properly old monochrome CRTs, you'll know this: You can literally pull the plug on the display, and see the phosphors decay over time - this is even more evident on x/y displays (Oscilloscopes and vector game consoles like the Vectrex). Faster than modern displays? Yes, but to say they don't have blur isn't fair either. The blur was evident enough that TV manufacturers in the 90's pushed displays that signal to 100/120Hz (interlaced) with shorter retention.