OED

English Country Dance Videos

The Young Widow

Childgrove's Channel Newcastle, plus at least 26 more dances on Paul Ross' YouTube channel; and
More than 160 ECD videos at the Country Dance and Song Society (CDSS) Dance Video Archives.
Newcastle Country Dancers (Professional) perform: Lull Me Beyond Thee; AppleyHouse; Ladie of Newcastle; Dargason; Argeers; Jenny Pluck Pears; Chestnut; Mage on a Cree.

Newcastle English Country Dancers - Lullling Beyond Thee

Stuck in Vermont, filmed Jan 7 - 9, 2011 at Burlington Country Dancers dance weekend with music by "The Flying Romanos".
Mr. Beveridge's Maggot from the BBC's Pride and Prejudice.

Sun Assembly's 2007 Spring DanceFest - Jack's Health

More from Sun Assembly's 2007 Spring DanceFest led by Bruce Hamilton: White Wheat, Faithless Nancy Dawson, & Sally in Our Alley.
Trip to the Manors from Sun Assembly's 2008 Spring DanceFest led by Gene Murrow.
Jane Austen Festival @ St Swithin's Church
Black Nag & Childgrove performed by Bill Spence on Hammered Dulcimer (music only).

Black Nag, caroso1581 - performed in former Cistercian monastery in Kostanjevica (Slovenia)

Playford's Progeny wiki is a vast collection of dance material assembled by John Nash, club members and others. It includes:

David Millstone, guest caller at Spring Special May 3^rd 2013.
Nils Fredland (on facebook), guest caller at Spring Special Apr 5^th 2013.
Crowfoot, guest musicians at Spring Special Apr 5^th 2013 and A Trip To Ottawa 2013.
Sharon Green, guest caller at Nov 9 & 10^th 2012 Trip To Ottawa.
David Smukler, guest caller at Jan 6^th 2011 dance, March 2010 Evening Social, Cross Pollination Workshop and many other events.
Paul Ross, guest caller at Trip to Ottawa 2011.
Karen Axelrod & Naomi Morse, featured musicians at Trip to Ottawa 2011.
Gene Murrow, guest caller at Nov 2010 A Trip to Ottawa.
Fine Companions, musicians at our May We Dance ball, May 2009, and Nov 2010 A Trip to Ottawa.
Orly Krasner, guest caller at 2009 May We Dance - bio, scroll 3/4 down.

Peterborough English Country Dancers, Ontario.
Durham Regency Dance, Ontario.
TECD, Toronto English Country Dancers.
Toronto English Country Dance Assembly. For more information email Maxine Louie, maxine.louie@gmail.com.
Hamilton English Dancers, Ontario.
True North Music and Dance, London, Ontario.
Country Dance New York, Manhattan NY.
Dance Flurry, near Albany NY.
Country Dance and Song Society, CDSS, programs include Pinewoods, Plymouth, MA; a source of CD's.
Country Dance Society, Boston Centre.

Dance Animations.
Richard Morgan, The Round.
English Country Dance according to Wikipedia.
Hugh Stewart, an index of country dances and where they are published.
Folk Music - An Index to Recorded Resources.
Robert M. Keller, The Dancing Master, 1651-1728: An Illustrated Compendium.
Philip Lewis?, The English Dancing Master 1651, transcribed as well as facsimile, includes MIDI music.
Master Trahaearn ap Ieuan, reconstructing an English Country Dance from Playford.
Alan Winston from text written by Linda Repasky: What is English Country Dancing?.
Gary Shapiro, What Is Contra Dance?

Ted Crane's Dance Database, covers USA & Canada
Set and Turn Single. If you are traveling to the UK check this listings web site for folk dancers.