I have a PDA (hp travel companion 2004) and it has WMP but it won't play my videos. I download them fom Youtube, convert them to "Windows Media Format" but when I sync them to my PDA they just show up either as a black screen or no screen at all. With one of them I heard audio, but there is never any visual at all. What's wrong??? How do I fix it?! Thanks!

10 POINTS to the 1st person to solve it!