How can we measure the success criteria of a music promo video?

There are many ways a music promo videos success can be measured, these include;

• Sales figures
• How memorable and discussed the video is
• MEdia coverage
• Video views e.g. Youtube
• VMA and MTV awards
• If its influential on other music videos
• Newspaper articles and TV reports on it
• Amount of publicity
• Downloads
• Charts
• Last word

There has been a massive switch in the importance of Youtube from TV channels such as MTC of recent, meaning most viewing of msic videos is now done online.