This video is actually a compiled slideshow and radio clip from WBUR, NPR Boston. For their 40th anniversary, MUMMENSCHANZ visits Quincy Market in a really neat flash mob. The piece is a combination of performer comments and viewer reaction.
There is also a whole documentary (Story of MUMMENSCHANZ) on video. The clip below is the teaser for the full documentary which (in theory) is available at http://docsonline.tv/doc/404 (In this case, “404” is the number of the entry, not an error. I checked.) Note also that you need a user id and password, and that it looks like the video is “pay per view.” Putting the link here if you want to pursue seeing it. The summary is also here, on Swiss Films: http://www.swissfilms.ch/en/film_search/filmdetails/-/id_film/2146531992.