Just a periodic reminder that I have put much of my collected videos of single row diatonic up on YouTube. My moniker there is gumbobubbha. Be sure and get that "H" in there.
Some are by Danny Poullard, who is no longer with us. Some of Geno. Some Harry Trahan. Some Gerard Landry. Some Andrew Carriere (Bebe's son). You'll see that all of these were recorded with the student in mind.
Here is a random one by Mr. Harry, recorded at Augusta: