Why is classic rock considered classic? Pop in this video. See John Lennon and Mick Jagger have tea together and philosophize. See John play the blues with Eric Clapton, Keith Richards, Mitch Mitchell and rock so hard that  even the musicless shrieks of his bizarre new girlfriend Yoko can't ruin  it. See Marianne Faithfull sing an incredibly dated Dylanesque ditty. See  Jethro Tull & Taj Mahal before anyone knew who they were. See the Who  blow the roof off the tent. And see the Beggar's Banquet-era Stones wrap it  up with 5 or 6 tunes and a big sing-along. This concert was recorded in  1968 when Mick was about 24 or so, Lennon was about 28 and it was finally  released by the Stones camp a few years back. (Thank you, gentlemen.) Even  if you could get the leading musicians of today together - Beck, R.E.M.,  Eddie Vedder, Pumpkins, etc. for a similar hootenany, it would still fall  way, way short. Essential viewing for anyone interested in the glory of  rock & roll.