I found this on my suggested videos. It’s given by Justin Thompson who affiliated with http://swing-simply.com. He discusses the “Position” that all of the pros get into at and through impact, how they get there, and why it helps them hit it so straight and far.
This very much reminds me of Hogan’s Five Lessons, but is told in a different and maybe more simple way.
This one from the School of Golf showed up in my inbox today. In it Martin Hall and Blair O’Neal share a drill to help turn your lead shoulder through the swing to help hit better long irons and hybrids.