A music video is a short film or video that accompanies a complete piece of music/song
is it artist that makes a good pop promo?
is it the song?
its actually neither. a bad song can have a good music video and a bad artist can have a good music video. although obviously these two factors do help!
a lot of micro and macro elements is what makes a good pop promo. things such as the location of a music video (if it looks good, its easier to watch), costume (if the artist looks good people will want to watch), props (anything interesting and different will always intise an audience), extra's.
making a music video look good and easy to watch will always make it better so thing such as shot lengths, camera angles and a variety of camera shots is a very important decision.
all of these things, also including the song and the artist combined is what makes a good pop promo!