This was actually a staged promotion for "In Search of Maria," which is the Dutch television version of a BBC television show.
It's lots of fun to watch and reminds me of when I was a kid and wished I lived in a Broadway musical, where the orchestra played whenever I felt like singing, and where random people could join in choreographed dancing and everyone would know all the words and all the moves.
(I guess that would get annoying after awhile, but still ...)
I know, I'm a musical geek. It's probably why I enjoyed this video so much. Check it out. I think you'll like it, too.
Hat tip: Mental Multivitamin