- Edited
Channel Lock is a method developed by John Hensby (JH) out of Australia. Bill Philipps is out of Tennessee and is a teacher of this method. It's basically a back ball position with an inside takeaway with the intent to swing in a 'channel' causing closed shoulders and an in to out swing. There's a few protocols that they advocate with this method.
JH's Youtube channel is 1atomicgolf and Bill Philipps channel is MMI Golf. Both JH and Phillips are very good golfers, but it's Mr. X (JH's) friend and Matt (Phillips friend) who look to be even better than JH and Philipps.
These two are high swing speed golfers who have taken their swings to new levels using this method. Both channels have tons of videos on this method. I'd skip the earlier ones as they just show the evolution of this method.
Have not tried it myself, but I give these guys credit for putting out something unconventional that seems to have some merit.