Four years ago Well featured a video by Matt Harding, a Seattle man who traveled the world to collect video of himself dancing a jig — sometimes with children, tribesmen or lemurs, and even underwater — all set to a soaring soundtrack. The video became a YouTube sensation and led to corporate sponsorships that allowed Mr. Harding to make follow-up videos.

He has returned with a new video, featured this week by my colleague David Pogue, along with an interview with Mr. Harding. Writes Mr. Pogue:

This time, it’s not Matt just swinging his arms, stepping in place. This time, he actually learned to dance, often in the style of the country he was visiting. As a result, there’s a feeling of collaboration, of immersion, that wasn’t in the earlier video. The kicker is the final shot….It’s perfection. And it’s hard not to tear up….What a weird, unguessable, uplifting piece of pop culture! I couldn’t help wondering how much of Matt’s video was pre-planned genius, and how much was happy accident. So I conducted an e-mail interview with Matt himself.

Watch the video by clicking the link above, and then read the Q. and A. with Mr. Harding on Pogue’s Posts, “Behind the Dancing Matt Videos.”