Place it immediately after the incriminating moment in your edit, so the accusation answers the action on screen. Follow it with a funny laugh to turn the callout into a joke, or a yeah reaction when the evidence is undeniable and no reply is needed.
About this sound
The clip is a short German spoken phrase lasting about four and a half seconds, delivered as a direct accusation that someone acted on purpose. It lands with a teasing, mock-outraged feeling, sharp enough to call out a friend but playful enough to keep the moment light. The short delivery makes the line feel pointed, personal and instantly repeatable in a joke.