It’s kind of long, about four minutes, but this is the most fascinatingly horrifying piece of pop culture memorabilia I’ve seen in years — Bing Crosby, Englebert Humperdinck, Gwen Verdon, Dick Shawn and a woman in a big black wig I can’t identify on a television variety show from, I’d guess, 1970, singing a long medley of Beatles music, including Bing’s very special version of “Obla-Di Obla-Da” complete with go-go dancers. WOW!