I`ve seen various references to different dialects in Japan, and some interest into how hard (or not) they are to understand.
I remembered a short video I have of some relatives talking to each other which has some great examples of the difference in dialects in just a very small area. One of them is from the Echizen coast, one of them is from Wakasa, and one of them is from the Fukui city area. I can understand them without any problem as I am exposed to those dialects on a regular basis - but it might be interesting for early learners to see just how different some regional accents are... And a bit of fun for more advanced learners to figure out what they`re talking about.
Dialect video