Useful resources for learning Taiwanese? My girlfriend is from Fujian and speaks 闽南语, so I am trying to learn so I can communicate with her family better. 

The struggle is finding any useful resources (even in Chinese), so I'm wondering if anyone has any good suggestions for sites, books, or anything else to improve my skills?
There is an American guy (I think) who teaches people how to speak Taiwanese on Youtube. He even teaches the native Taiwanese people how to speak 闽南语. You can see the videos here.

EDIT:
Looks like the playlist is dead. This is the guy https://www.youtube.com/watch?v=lJo2OHi6hgs