I can't understand him half the time on interviews (music videos use what's recorded in the album so they could just control him and get a sober take). The jewel in all that was when he was on this interview, and his sentences got progressively more garbled, then he stopped and said, "what was I saying?!" I spit nachos all over the living room laughing - hell, he was so out of it he doesn't understand himself!
I had a friend whose speech was starting to get slllloooooowwww and really slurred (we have no idea what he was smoking at the time, he went to a different University for a while and we saw him during breaks), and when he went to the toilet, everyone started doing their drunk Ozzy impressions (including the hip hop guys). So wrong but it was all too hilarious.
And yet everyone thinks he's awesome, without necessarily being dumb enough to actually do acid (or other stuff). YOLO wasn't a thing back then.