Harry Carey starts getting discussed at around the 20 minute mark. John Wayne starts to talk about the scene at 23.50It is a generation thing, Harry Carey was the Cowboy of the 20s30s40s handing the mantle to the Dook. Try watching any cowboy from the last twenty years, one or two outstanding. Most lack the true grit that made Yellow sky, the gunfighter or Winchester 73 so good.
If anyone has a few pounds to spare
The series itself ("Hollywood") was shown in 1980 and made by the same team that made "The World At War". A must for anyone who is interested in silent movies.