Their parody of the relationship show Napakymppi, which was based on the Dating Game format.
There's no room for translator's notes in the video, so I'll put it here. Napakymppi means "bullseye", or literally "central ten". "Napa" is also the anatomical term "navel", which is the meaning "napalanko" uses. The word means "brother-in-law of the navel". When you're bellybutton BILs with someone, it means you've both slept with the same woman.
