I think they made the correct decision using yellow for a display model. Trust me, they are well aware that silver and white are the best selling colors; but, these can hide body-lines, as can black.
Orange, red, yellow, and certain greens are proven to stand out, both visually and psychologically. Red and orange are associated with danger and aggressiveness, while green elicits a relaxed emotionally yet energized, neutral response. Yellow is associated with joy and cheerfulness, such as a sunny spring day; alert and playful.
They are not only trying to stand out from other manufacturers direct color choices, but also in your psyche; they know you understand that you can select from a decent range of well selling and niche colors, but they are not selling the car at this event; they are advertising.
As for the tail-lights, I believe this was to express contrast with the dark interior, grill, tints valence and wheels. I don't believe it matches with yellow but imagine with white or silver as the video displays; imagine paint-matching or smoked.
When faced with disagreeable occurrences (in this case your color-preferences), most minds respond by envisioning alternate possibilities, and then possibly, responding physically to enact those visions.
First, you see the bright color, standing out amongst the silvers, whites, blacks, greys, blues, reds, and browns; then, you see the stark contrasting body-lines; sharp angles contrasting against that bright yellow along with the wheels. You think to yourself, "I wouldn't have done yellow. I could do better!", then, you want to. You want to prove that you can build the image you see in your mind.
It is inherent human nature.