Here's a Health to the Barley Mow: A Century of Folk Customs and Ancient Rural Games DVD
Surprisingly, no-one at FO seems to have mentioned this so I shall shout for it. A two-disk extravaganza chock full of "poetic documentaries, long un-seen television reports and rare silent film footage" on British folk dances, games and rituals from yesteryear to recent thymes, featuring just about everything from Dwile Flonking to Kitchel Throwing. A bit pricey but glorious time-travelling stuff. More details here.