Rory McIlroy's swing in slow motion (every angle) - YouTube
Physics of the Golf Swing | SportsEngine
Mastering the Effortless, Slow, and Easy Golf Swing | Golficity
The 11 Strangest Golf Swings of All Time
Tommy Fleetwood - Slow Motion Driver and Iron swing analysis - YouTube
Zach Allen golf | Video analysis and sports coaching mobile app for iPhone and iPad, with slow motion and side-by-side comparison - Ubersense and Ubersense Golf