YouTube's "Recommended Videos" are very hit or miss. This was a hit:

[capri0mni]

Not for the cinematography (camera work is a bit shaky and out of focus in places), but for the subject matter: live folk music concert at an outdoor venue. There are a few folks up, swinging their knees, at the start... then the video-maker does a slow panoramic shot of the whole park. And when the stage comes into view, again, the dancing crowd has tripled, at least -- each person dancing just for the fun of it, not caring to impress anyone else. How can that sort of joy be anything but infectious?

"La Vent du Nord" gets things moving in London, Ontario

(The Music's pretty good, too)