give us the link to the video you want to see. right now all we can do is throw ideas at you.
it might be your player, it might be your codec, it might be your browser.
until you can give us more info try these
-update quicktime
-get an alternative player such as lan player (much better than wmp)
-get divx for mac
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Everybody Knows that Christians dont beleive in Gravity
I intend to live forever, so far so good
If you were touched by an angel call the police.