Das kostet literally means that costs in German, and online the clip is used less as a translation lesson than as a shorthand for consequences. Because it is only about a second long, it fits neatly at the end of a fail, a shopping haul, a gaming blunder or a joke that goes too far, where a longer explanation would ruin the timing. Its appeal comes from that economy: one dry line can imply a fine, a loss, a repair bill or simple payback without spelling anything out, which is why editors keep returning to it for quick, repeatable punchlines.