I absolutely agree that a video of someone talking is a much
higher bandwidth form of communication. Similarly, usenet was higher bandwidth in 1995 than it was in 1985 -- but that doesn't mean that it was
more useful, only that there was far more noise.
Maybe this will work out fine, but I worry that with a video you'll pick up things like "this guy seems uncomfortable" but not be able to identify the reasons why (is he uncomfortable with the rest of his group? Or just uncomfortable being in front of a camera?) -- or worse, get a subjective sense that a video isn't very inspiring without even identifying what you're noticing, never mind figuring out whether what you're noticing is signal or noise.
There's a reason why most professional symphony orchestras use blind auditions: While nobody disputes the fact that being able to see a musician play is valuable, experience has shown that the noise it introduces is more significant than the signal. Simply put, eliminating the high bandwidth distraction of being able to see someone allows orchestras to pick better people.