Mr. Ambiguous
... that the music video for Mamamoo's "Mr. Ambiguous" includes a hidden camera prank?
... that the music video for <a href="./Mamamoo" id="mwAd4" rel="mw:WikiLink" title="Mamamoo">Mamamoo</a>'s "<b id="mwAd8"><a href="./Hello_(Mamamoo_EP)" id="mwAeA" rel="mw:WikiLink" title="Hello (Mamamoo EP)">Mr. Ambiguous</a></b>" includes a <a href="./Hidden_camera" id="mwAeE" rel="mw:WikiLink" title="Hidden camera">hidden camera</a> prank?