Airing tonight on PBS is an hour-long program called “Happy Holidays with the Boston Pops” in which Keith Lockhart leads the orchestra in Christmas music. In honor of that, here’s Arthur Fiedler conducting one of their versions of “Sleigh Ride.” There are at least three different albums in which he and the orchestra played it, so I can’t tell you whether this is the 1949, 1959 or 1970 version.