Appalachian studies takes many directions and can be found in many different databases. Below are a few general databases to start your research; from here, we suggest you choose from the many available subject specific databases. Try using Appalachi* (by replacing the last letter(s) with the *asterisk symbol, you are actually searching for Appalachian as well as Appalachia) as one of your search terms to focus your searching.
You can find many video examples of Appalachian Dancing on You Tube just search Appalachian Dancing, step dancing, clogging etc.