To put a video on there you go on Google and look up Music Video Codes. You take the code of the video you want and paste it where you want it on there. The everytime someone goes there it will play.
To change the color and stuff you have to use an editor. The link to the one i used is www.pimpwebpage.com . There are other ones you can find as well. You change everytihng on the website and then click give me my pimp code and you paste it anywhere on your myspace and it will change everything.