.wmv from your windows movie maker will work fine.
But you maybe made them too big for the web.
They have to be a certain size or smaller..
Per YouTube's specs:
"Uploads usually take 1-5 minutes per MB on a high-speed connection, and converting your video takes a few minutes.
Your video is limited to 10 minutes and 100 MB."
I suggest resaving them for the web, at about 640x480 aspect ratio (perfect for youtube) and for 1meg LAN network speed or so.. in your settings.
-R-
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