How the process of a music video works

In the music industry A commissioner from a record label sends the track of which they want a music video for to 5-10 directors. Each director then has to submit a treatment to the record label. The director who the record company thinks has created the best treatment will be commissioned to make the video. Only at this point is the director paid. Only the successful director is paid, which makes it even more important for directors to come up with a good treatment.