I am familiar with the 1963 French-Spanish film of this name that contains two very nice cancans, but finding this came as a very pleasant surprise.
It's a true spectacle with classic costumes and more dancers than you can count. I'd love to see a higher resolution version of this.
The full film is posted on You Tube. This is excerpted from part 2, which you can find at:
http://www.youtube.com/watch?v=BIXJOKcvF6w (starts about 28.30, although there is a music hall scene earlier that doen't qualify as a cancan)
Part 1 is at:
http://www.youtube.com/watch?v=tauv7dWHAuo
Barbebleu
