Sometime you may need to change the color or shape of the video player. But normally it is in a swf file. So we may need to change the swf source file. First of all you need a swf de-compiler to get the source of the swf. I use Sothink SWF Decompiler to make it. Its have 30days trial version but can fulfill your need. To download it go to http://www.sothink.com/product/flashdecompiler/
After the installation open the swf and export the fla source file of the flash.
Then you need adobe Flash software to edit the fla file.
Open the ~videoPlayer.fla in adobe flash. Press ctrl+L to open the library of the fla. And make your change what you want.
Then run the source and get the swf output. That’s all :-)