Golden *nose* is a nod to the nose as phallic symbol, turning Villain into a bit of a Cyrano, but one who can overcome his insecurities.
The way the agent's hand shakes as he comes down the stairs around 2:20 is that nervous 'oh god what am I doing, but I've got to do this' anxiety
When he gets to the floor and reaches the villain, the spinning hand-touches are perhaps supposed to be feint and counter-feint moves in a duel, but truly they are the initial 'I'm afraid to touch you, what if it's not right' movements in like teen romances (or very shy adults). Then in case anyone was watching, they engage in some choreographed fisticuffs, but either quickly give it up as fooling no one, or only doing it as a joke referring to the circumstances under which they met, but it quickly just turns into joyous dance.
When Villain returns home at the beginning of the video, his smile fades and becomes fixed as he surveys his home. Now, it grows.
Being set in mid-century, one has to pay attention to gender roles. Previously, it was the villain's wife responsible for creating dinner and serving it. Here, both men share the roles traditionally assigned to women. Agent is the one preparing dinner, but he picked up Villain during the dance number to twirl him around, and then back at the table, Villain is the one serving out the food.
When the camera lingers on Agent's face at the table, the shot is the same as when it was the Villain's wife previously, but instead of becoming discomfited under the villain's gaze, Agent melts.
The best part as they continue to dance in the lair is all of the minions just going about their duties--this is the new norm. They're still regimented, marching in single file in contrast to the silly lovey goosey behavior their boss is exhibiting.