What I like about this video, in which the putting genius Crenshaw discusses his craft, is that Ben never talks about mechanics. He's asked to offer advice to recreational golfers, and the advice he offers is about feel, and nothing but feel.
Crenshaw talks about the way most amateur golfers grip the putter - too tightly, he says. "Hold the putter as a delicate instrument, because you're doing delicate work," Crenshaw says. And: "Back off the grip pressure just a little bit, that makes the putter head feel heavier and therefore it swings more."
He then switches to what he calls one of the best things he heard Harvey Penick say about putting, "Never look like anyone else when you're putting," and explains what that means.
And finally Crenshaw briefly touches on the speed vs. line debate, and you can probably guess what side of that debate Crenshaw is on.