Most of my videos are just screencasts or slide narration where I don’t appear, so in reality I’m usually wearing a t-shirt and jeans! But when I do appear on camera, I do put some thought into my attire. You want students to identify with you, yet you still want to look like a respectful authority figure. For courses aimed at engineers, I’ll usually wear a collared shirt, but without a tie or jacket. But for courses aimed at executives, I break out the sport coat.
It’s also important to avoid complex patterns in your attire, as they can create odd interference patterns on camera. I have a section of my closet that consists of tailored, solid-color shirts for use on camera.
And I also think it’s important to have some sort of “signature” in your apparel. Steve Jobs had his turtlenecks; Bill Nye has his bow ties. For me, it’s a flat cap, and I’m never on camera without one.
Do you have a "signature"? What is it?