A bit of gutsy Northern. The dancers are the Nicholas Brothers (full video below) . If you want to see the roots of Northern Soul dancing its in the clip on this video. As a kid I used to watch these guys, and the Clark Brothers, and other dancers like Fred Astaire, and Gene Kelly (who did dancing on roller skates about 30 years before roller disco), and Donald O'Connor, just to pick up tricks, foot moves, body positioning etc. Excellent backdrops by the Brothers in this clip! But, the classic Nicholas Brothers routine is from Stormy Weather, last clip. Described by Fred Astaire as the best dance routine ever!