The key innovation in the development of the modern musicvideo was, of course, video recording and editing processes, along with the development of a number of related effects such as chroma-key.
Instead of watching the video for the music, (the basis for the artform), the videos are appreciated for their visual qualities, while viewers remain uninterested in the audio portion of the performance.
Musicvideo directors, like most filmmakers in general, emerge from disparate backgrounds, and don't share much in the way of common thinking or set-in-stone pedagogy, bringing to the field a diversity of experience.
Music Fan Clubs - So you have a most favorite artist or band, and now you want to be part of their fan club.
Music History Resources - The authors of this website have used the book, A History of Western Music by Donald Jay Grout and Claude Palisca (4th ed.), as a guideline for their informational categories.
Music Arrangers - Music Instruments - Very cool graphic chart of instruments and their ranges on the first page, and then when you enter the main site you will find reference articles to different musical instruments such as Brass, Woodwinds, Strings, and more.