I never thought of the original as a Charleston song, it's more of a megaphone crooner.
The "dude" also has a youtube channel where he claims he's the author.
I did ask in the comments of the PH vid, as he matched the vocal style exactly, but no answer.
I have a feeling that it's from a totally obscure artist. I used to have a 100 lp set from Franklin Mint "The Greatest Recordings of the Big Band Era" that included a lot of unusual bands, I think I may have heard it there. I also used to have about 1,800 78rpm records, mostly obscure stuff...
I had more than 3,000 LPs as well. I packed all up in boxes when I moved, and 20 years later found I never unpacked them (thanks, empeg, and later, youtube). I ended up giving it all to a collector friend.