Actually, this is a 1900 filmed record of a clog-dancing contest. (Riverdance always made me think of constipated white people dancing.)  It might not be clog-dancing per se, but it's fun to watch.

Click to view

Disclaimer: I ganked this from abjectreptile

Warning: spoilers and lots of ranting.

‘HOUSE’: MUSICAL NUMBERS? WESTERNS? YUP.
( Spoiler/press release )