I really am getting old. The only one of all of those sequences posted that I have ever seen is the "Dirty Dancing" one. I thought the dancing in that movie was great, but ( this is a "Senior" forum ), I don't think any of these are even close to the golden age of the Hollywood musical. I am not proficient enough to post videos. I'll just drop a few names. Donald O'Connor, Gene Kelly, Fred Astaire, Gwen Vernon, Eleanor Powell, Cid Charisse, Vera Ellen, Ann Miller. I'm missing a couple of others. Those were dancers!
There is a longer version with more of Bill Robinson alone. This has been colorized.
Normally I prefer original black and white but the difference in quality was significant.