I have several friends on Harding's staff and I've sent film to them numerous times. Players to for that matter. It may not be what they watch in meetings, but trust and believe that they appreciate it. In fact, as somebody who records my own footage for my media work, my angles from the stands are often more clear than what they have, so I've shared some of that to. That isn't even considering if a play or two is missed while filming OR if weather conditions limit visibility. Every little bit helps.
Most coaches willingly trade film, but they don't send every single piece of footage that they have. Coaches use every way possible to get as much as they can.