Based on his observations, what we call "light" isn't actual an independent physical entity in itself, but is rather an observed change in the intrinsic nature of objects. Very interesting.

There is so much wrong with that presentation

It would take like a 2hr Dimond bros style video to cover everything wrong with it. Quite the train wreck, and I'm not one who like to avoid refuting something, but there's so much messed up in that slideshow. He needs to rethink it and re-present it, and then I might give refutation a shot. 

The magnet and pins comparison to what happens with light and gravity is an interesting idea, but at least light is much too different, though somewhat related.

What does Lad think of it, he's smarter than me as far as logic, philosophy, and debate skills go.