dung.swf is some sort of flash-based animated video starring what appear to be fly or tapeworm larva singing a song, apparently in praise of poop.
There are plentiful
kanji Korean (?) titles. At times the chorines don poop-hats.
It’s not grotesque in a not-safe-for-work way. In fact, it’s practically kawaii. You may wish to be at a midpoint between meals, however.
Poupou would like a translation.