Christmas carols: Kommet, ihr Hirten
This is a traditional song from Bohemia. (There are versions of this song in both German and Czech, but the Czech version isn't a Christmas carol.) As it turns out, the hardest thing about finding videos of this carol was finding one that wasn't horribly cheesy. I think the tune is quite lovely, in a wistful, folk song kind of way, but apparently it inspired many choir directors in the 1970s to force entire children's choirs to dress in matching lederhosen for TV specials. This video, which features lip-synching shepherds (the "Hirten" of the title), is par for the course.
I did finally find this instrumental version, which is nice.
And then I found this version, arranged for voice, guitar, bongo drums, and, um, fish-shaped percussion thingy. This made wading through all of the cheesy 70s videos worth it.
Raketenklee (Bidi, Ray and Marc Clover), 2008:
(If anyone's German is better than mine, I'd be curious to know what they're saying at the beginning and end of the song.)