This video was presented as "bro's night out," which makes it seem like a silly game, but watch and listen. These guys are making serious music! Well, maybe not 'serious' music, it's the theme from Knight Rider followed by the theme from The Flintstones, but they do it well.
They are playing musical instruments called boomwhackers, or tubes that are tuned to a musical pitch to be played like bells. The group is Louie's Cage Percussion, made up of classically-trained musicians from Austria.
Named after the Monkey King Louie and the composer John Cage, this percussion group consists of six talented young musicians in their twenties. They are some of the youngest members of renowned Austrian orchestras including the Vienna Volksoper, the Lower Austria Tonkuenstler Orchestra and the Graz Opera and play all repertoires of classical music. Besides their studies of classical music, they have always been interested in jazz, rock and electronic music and have played in various bands and broadened their knowledge of various musical genres.
You can get an idea of how boomwhackers work from an extended cut of one of their practice sessions. Now watch a stage performance from Louie's Cage Percussion.