anyway, examine this on its own terms
that video's most obvious (besides Prince) glaring omission from any important 80s shredders list is Kerry King. he took the techniques of shredding and turned them inside out - all the fast scales descend into atonal shrieking and squealing, held together by his infamous prolific whammy bar abuse - into almost a parody of virtuosity, if (probably) not an intentional one. it was really a sea change in heavy guitars. Tony Iommi took the pentatonic scale more or less to its logical conclusion, but in the boiling nexus of mid-80s extreme guitar music whence death, black, and grind, there's a major shift to dissonance and atonality. people do talk endless shit (which to me mostly misses the point) on King but whatever your take the massive influence of him and Hannemann across the breadth of heavy guitars is undeniable. specifically relevant here are big name death metal pioneers like Chuck Schuldiner and Trey Azagthoth, super technical and highly influential shredders in their own right.
but it was a highly divisive shift - think of united ardkore splintering into jungle and happy hardcore, with the middle ground here being something like Metallica
Malmsteen etc style "shredding" otoh is a cul de sac of bone-dry autoeroticism. its endgame is Dragonforce, i.e. almost literally just masturbating onto a fretboard.
glam metal lead guitar - C.C. Deville, George Lynch, etc - is applied Malmsteen
tbf its squareness of Malmsteen dorks is impressive - The Clash were already ironically calling out "you're my guitar hero" in 1977 - gotta respect their resilience
still how much sympathy can one ultimately have for anything that makes Yes and Emerson Lake + Palmer sound exciting (at least they're weird) by comparison