There are on doubt plenty out there to find, but here's some clips of the Nicholas Brothers
http://www.youtube.com/watch?v=EexOzjz6Gn4&NR http://www.youtube.com/watch?v=gVahh65i2LQ&NR
And the one that always stands out in my memory, from Stormy Weather, the members of the orchestra keeping their cool. (& no, I didn't see it first time around!)
http://www.youtube.com/watch?v=zBb9h...elated&search=
Not too surprising that Harold suffered cripling arthritis in later life, but he could still dance after having hip replacement ops.
Greg