um player de video completo pra voce customizar à vontade

 

bem bacana essa iniciativa: um player bem avançado facílimo de customizar usando o Blend:

This project creates a fully "Designable" Silverlight Video Player. This is not to be confused with a "Skinable" Video Player. A Skinable Video Player allows you to change the look and feel of the existing controls of the Video Player. A Designable player, allows a Designer to use ANY set of controls to implement the Video Player. For example, a Designer could replace all the buttons with a single dial that a user rotated into different positions, or they could change the method a user uses to select from the list of available videos. This can be done in Expression Blend without writing any code.

aqui está, pode pintar e bordar ;)  Silverlight Advanced MVVM Video Player - CodeProject