One of the beautiful things about D-Styles is his unique flow (and style, obviously)... I'm GLAD that he doesn't have a ritualized conservatory-style approach to scratch training.... because then he wouldn't be D-Styles.
The fact that he said he could scratch to a 130bpm+ made me crap myself.... I thought I was the only one who used my head and let my hands follow! I don't feel alone anymore.... :)
there was no RU-vid. How I got better, i lucky to have a mentor who taught me the basic. I would network with other DJs i was cool with(remember this was'85, no bittin' someone's style.) I would hear my favorite DJs on radio or album(marley marl, jazzy jeff to name a few)and try to copy what i heard and sometimes i might by accident stumble on a scratch. and last but not least practice, practice, practice.