The video quality is pretty sketchy, but that's only because this footage comes from a documentary that is not available on dvd or cassette (unless you had been watching it and recording it at the time it was aired, which was sometime in the early or mid-ninties).
Fun fact: The first stanza in this song is taken directly from an old spell that was believed to turn witches into hares and then back again. In the American colonies, black cats were considered to be witches in disguise, but in Northwestern Europe, especially in Scotland, hares were believed to be witches in disguise.