I didn't think I wanted to argue this further, but I hate stereotyping, mainly because people will miss so much of what is real, what is diverse, in all of the cultural treasures we have.
...country music does tend to be dominated by artists from the south and the lyrics tend to frequently speak of the south.
But again, what is "the south"?
...the Country Capital is Nashville...
When looking at country music, much of what has come from the era of recorded music and television entertainment is going to have that Nashville commercial production influence, but the real roots go back much further, to farm and ranch communities, saloons and honky-tonks, churches, isolated mountain cultures, the era when livestock shows (before commercial county funnel cake fairs) were meeting places for discoveries and local roots entertainment, etc. etc.
...So while country did evolve from folk as well as from "cowboy music" (which I guess maybe was derived from folk also when I think about it) it tends to be rooted in the south these days.
Again, what is "the south"? We have a lot of what you would call that "cowboy music" in Texas, derived from Texmex ranchera music as well as more recognizable country music forms, and dance forms such as the Schottische and others that morphed from square dancing.
"Cajun" country music arguably came from Canada with the Arcadians that came down the Mississippi, but it gets mixed in with radio country music formats.
Some argue the "blues" began in the Mississippi Delta, others say real blues started in Chicago.
You still are not distinguishing "southern" from "country". What is "the south"? No native Texan I've ever known would consider Texas to be part of "the south", nor have I ever heard Oklahoma and Arkansas referred to as "the south" before the vids you posted today.
The song "That's what I like about the south" was written by an Indiana musician. Eddie Rabbitt is from Brooklyn NY. I didn't mention the Irish origins of a lot of country music, and there are plenty of Irish in the northeast US (and elsewhere of course).
I suppose I'm making this discussion way more important than it should be.