I believe there is some information we can learn from it. IMHO, the speaker could have explained the concept or design better. At least it’s better than nothing.
In his talk, he analyzed some work from famous artists or photographers, how simple lines or arcs formed in the art work, and how those were used to emphasize the subject and how to make the subject popped. Some explanation, IMHO, might be a little bit of stretch and I don’t think the photographer saw it that way when the picture was taken. But what do I know. It could be that it’s the second nature to the photographer.