Happy 4/20! Spoiler alert: Today’s slate of 150-plus singles, videos, cover tunes, remixes, golden oldies, unburied treasures and live performances is packed with reggae, jam bands, stoner rockers and psychedelicists. Shocking, I know. Of course, it also has a ton of roots and metal, so go figure. In any case, you won’t find most of these gems anywhere else. Your Tinnitist-approved tracks are tagged with 💨. Smoke ’em if you got ’em: