Apple has posted four HomePod ads on its official YouTube channel, in the form of four 15-second music-focused clips that emphasize the HomePod primarily as a “breakthrough speaker.” The ads, titled Distortion, Bass, Equalizer, and Beat are each set to their own tracks, with most of the clip animating the word “HomePod” to the beat of the music, followed by a very brief glimpse of the speaker followed by an “Order Now”…