A few performances were geared to the audience in the theater and not for a closeup lens. And that indefinable and intangible something that exists between audience and actor eluded the camera. That didn't bother Dennehy. That's the good part of it. That's the whole point.
Theater is an existential art form.
It exists while you're doing it. It's the same with a dancer or a musician. A reason for retrospection The Salesman revival was part of what appears to be a time of looking back on Broadway. Kevin Spacey starred in Eugene O'Neill's The Iceman Cometh a couple of years ago. There was Salesman, and the recently closed The Man Who Came to Dinner with Nathan Lane.