Hello,
I am currently a History student, and my teacher, an expert in (ok Byzantine) medieval History taught us that reasoning in terms of "German" or "French" (note : neither the term "France" or "germany" were used at the time) is anachronistic so early on.
It is also important to note that Charles Magnus was a latin speaker, had his capital in what is modern day Germany and considered himself as the new Roman Emperor. He did not identify with Francia Occidentalis (France) or Neustria (basically Rhineland), they were just territories that he happened to control.
So I guess either you don't count him, or if you count Clovis as king of France, you should count him too, as he effectively ruled the territory of modern day France, but then again you could also count him as a German monarch.
I suppose the easier for you would be not to do a video about the Kings of France, but of the Kings and Monarchs who ruled France, which would be more accurate I believe. If the debate goes on, I'll make an effort an look it up in my books to get clarifications.