Now he’s on the streets in Mumbai one minute, balanced on the Giant’s Causeway rock formation in Northern Ireland the next, and then he’s in a tulip field in the Netherlands or in front of a geyser in Iceland. Sometimes Mr. Harding dances alone. On a Christmas Island beach he has an audience of crabs, and on Madagascar he performs for lemurs.

But more often  and this accounts for much of the video’s appeal  he’s in the company of others: South African street children in Soweto, bushmen in New Guinea, Bollywood-style dancers in India, some oddly costumed waitresses in Tokyo, crowds of free spirits in Paris, Madrid and rainy Montreal, all copying, or trying to, his flailing chicken-step. Mr. Harding even dances for a lone military policeman (unmoved to join him) in the Korean demilitarized zone.

In many ways “Dancing” is an almost perfect piece of Internet art: it’s short, pleasingly weird and so minimal in its content that it’s open to a multitude of interpretations. It could be a little commercial for one-world feel-goodism. It could be an allegory of American foreign policy: a bumptious foreigner turning up all over the world and answering just to his own inner music. Or it could be about nothing at all  just a guy dancing.

However you interpret it, you can’t watch “Dancing” for very long without feeling a little happier. The music (by Gary Schyman, a friend of Mr. Harding’s, and set to a poem by Rabindranath Tagore, sung in Bengali by Palbasha Siddique, a 17-year-old native of Bangladesh now living in Minneapolis) is both catchy and haunting. The backgrounds are often quite beautiful. And there is something sweetly touching and uplifting about the spectacle of all these different nationalities, people of almost every age and color, dancing along with an uninhibited doofus.

Children, not surprisingly, turn out to be the best at picking up on Mr. Harding’s infectious vibe. There’s frequently a grown-up, on the other hand  especially one in the front row of a crowd  who tends to ham it up and make a fool of himself.