Place it as the payoff at the end of a setup, after Ceeday Huh sets up the doubt and before Oh My God Wow carries the reaction further, so the agreement lands as the turning point rather than the opening line.
Über diesen Sound
This is a very short voice clip of someone saying 'Indeed' with strong emphasis, lasting just over a second. The single word lands as a knowing agreement, dry and a little smug, and it works because nothing else gets in its way. It gives a listener a quick jolt of recognition, as if the speaker has just confirmed what everyone already knew.