Place it just after the confusing moment in your edit, then follow it with Oh My God Wow and Ceeday Huh in that order, letting each clip answer the one before it.
Über diesen Sound
This is a short two-second vocal clip of a friend making a long, drawn-out 'ooohhn' noise, somewhere between a groan and a confused hum. It feels awkward and funny at once, like a reaction that does not quite know what it is reacting to. The clip came from a friend recording the noise themselves, which gives it a casual, homemade charm.