I did the video (submitted R2 already). However, due to size limits, I wasn't able to do much. I only showed a pic of myself with me talking in the background. And of course there will be looks bias. There's voice bias, personality bias, grades bias, writing bias, family connection bias, etc. I think it's biased that I do not have the physical gifts to compete in the Olympics, yet some of the other applicants were unfairly born with these characteristics. There are 10 million biases.
Showing yourself reveals to the adcom if you can present yourself well, which is very important in business.