I opened my South by Southwest (SXSW) session with a confession: I have a video from over a decade ago where I am impersonating Ron Burgundy from “Anchorman.” Stiff delivery, robotic cadence, completely inauthentic. Did I say video? I’ll clarify and say this was footage broadcast on the local news during my stint as a local TV news reporter. I thought that’s what “being on camera” was supposed to look like. I was wrong. Today I speak on stages a…