[Solved] Flash Player green screen when playing a video

Try with the following (usually there is no need to reinstall adobe flash):

• Disable hardware acceleration: While you are on a video page, right click anywhere inside the Flash Player and choose settings. Now click the first tab that says Display (look for the monitor icon) and uncheck “Enable Hardware Acceleration.”

• Clean all your browser history 

• Clean flash cache from adobe manager 

• Clean Flash Cache files:
  
  
  Windows (tip: copy and paste these paths into the path bar in an Explorer window) %appdata%\Adobe\Flash Player 
  %appdata%\Macromedia\Flash Player 
  
  
  
  
  Macintosh 
  ~\Library\Preferences\Macromedia\Flash Player\ 
  ~\Library\Caches\Adobe\Flash Player\

image taken from http://www.labnol.org/software/green-video-in-flash-player/

Ref: http://forums.adobe.com/message/4278569