I know its not the same ok, but lets remove the Instrument from the equation. is this mindless Shredding too?
Yes and no. Mindless, no. Shred, yes.
There's a lot of classical music that conveys emotions with a lot less notes.
You'd have to get into a whole thing about "fast playing" in music in general. There's shredding in classical, shredding in metal, shredding in country (bluegrass) and shredding in jazz. And even those things, you can break down even further.
I'd break down my distinctions into... idk, three categories. Composed shred, improvised shred and I guess maybe, competitive shred?
Most of what you're showing in the classical example is what I'd consider
"composed shred". It's something that's written to be deliberately technically demanding. No statement about how enjoyable it is to listen to for the average music listener, but it's supposed to be "impressive" to the listener for the difficulty to write/play but also "impressive" when you hear it performed (this is very common in classical performance) for being able to execute something someone else wrote and played at such a high level.
Obviously VERY high in the skill department, and not mindless.
This would be an example of that:
"Improvised shred" is something you see a lot in jazz, bluegrass and blues. There's an actual "song" there in the traditional sense, but the compositions are usually designed fairly simple, maybe one or two verses max, chorus and that's pretty much it. The bulk of the run-time is usually in the improvising, though, and the song is composed accordingly. One of the usual examples of this would be a song like "Sweet Home Chicago" or really any 12-bar blues type tune. The main feature is a section in the middle where, typically, the musicians all take turns improvising a solo and trading off to the next person.
The "song" part is probably the part designed to appeal the the listener the most, but the jam could be interesting depending. Usually this is music by nerds for nerds, since the most enjoyable part of it is typically being one of the people up on stage and either showing off or seeing what the next person will come up with.
This is also pretty high in the skill department, as it requires playing through changes and along with a preset composition. Typically involves some theory knowledge or at least a good ear. I'd even consider something like "free jazz" to fit in here, because even improvising over a piece with NO strong footing in the key is still a matter of creating an atmosphere and aesthetic with the playing in the context of what it's played over.
My example of "improvised shred":
Then there's
"competitive shred" which is pretty much the video in the OP or yeah, a lot of that MAB or Rusty Cooley stuff. "Betcha Can't Play This" is kind of a universal example of that. This doesn't get a lot of respect in the guitar community but you see it more in extreme drumming. Seems to mostly be an anomaly of metal music although I guess you could say that thing with Kenny G playing the note for the longest time qualifies. There's some overlap into the "composed shred" category, in that it can be used in actual music but it's usually a lot LESS about how well the part fits a song and more about literally just turning the speed up to 11.
Typically skillful, but I guess more focus on athleticism. Fairly mindless. So-so enjoyable to most people.
It's actually a pretty good song in it's own right but kicks (and the blasts) in this tune are pretty famously "fast-for-the-sake-of-being-fast".