My video adolescence is proceeding apace and I have come to the point of considering the rig. It is, at least, a mechanical thing, and understandable. Briefly, it is the framework about which I might construct a confection of accessories to make the video camera experience...
Do you know who Bluestockings were? Go look it up. Then find a novel by Sarah Fielding and read it. It won't have photography in it, but you'll be on your way to literacy. In the meantime have a look at the Leofoto tripods in Camera...
We are often told to simplify things and become minimalists. I can't tell you how many complex books I've collected on the subject...