Some time back, I discovered Melanie Oesch and her family on YouTube. They are a musical family who specialize in traditional Swiss folk music. Melanie is the lead singer, and is quite possibly the best yodeler I’ve ever heard–certainly one of the best three.
Here’s an English-language family biography.
http://www.oeschs-die-dritten.ch/en/we-are/biography/
Being Swiss, they typically sing in German. I don’t know German, but I enjoy their music. Here are some examples.
This one is considerably longer. They have done a little in English. This one is a major change of pace, but they do quite well. I would be interested in knowing if any German or Swiss Dopers have heard this family or attended a concert.