DC Current Flow: #1 The True Single Phase

In this video, I discuss how one could justify using the phrasal term “single phase” when referring to current flow in a Direct-Current (DC) circuit/system. In a DC circuit, current flows in only ONE direction-which, essentially, could be considered as its “one and only PHASE." With one AC Cycle, at any given moment (that is, DURING any given PHASE), current flows in ONE direction-and ONE only! So, if you think it through, you’ll come to realize that a given AC system is not unlike TWO DC systems operating in succession and repetition. That is, at any given moment, a given phase (EITHER A or B) of AC service is functioning as a DC conductor. That sounds too simple, and too easy-right? But it does help one see how the phrasal term “single phase” is a really inaccurate and misleading term when it's used to represent "Single-Cycle" AC Service.
DISCLAIMER: I am NOT an electrician or a professional in any of the trades. Nor am I a teacher; I'm not qualified to teach ANYTHING to ANYONE. I am NOT giving ANY sort of instruction regarding the hands-on practice of electrical work. My goal is simply to share ideas that I've carried with me for decades. UA-cam affords me the avenue through which to share them. Also, whenever doing ANY electrical work at home, TURN OFF the power FIRST.