We know better. These moves are god-given. They're not—can't be!—taught. Griffith was born with the Lord of the Dance in him, and what you see above is that spirit just kicking ass and taking names. While wearing a California Conservation Corps uniform.
From the video's description:
California Conservation Corps members Antwon McCoy and Leonard Patton aren't just hard workers. They are also very good dancers who have taught their big nature nerd/mountain man boss (John Griffith) more than a few dance moves. When they aren't busting moves, all three do a lot of trail building, salmon habitat restoration, and tree planting in the CCC