Could be your modem speed, or if your server is running slow/clogged that can have an effect too - even though this is a streaming broadcast. Try checking your set-up for Quicktime - what modem speed have you set? Also check your security settings. Too high can block almost everything.
Good luck. Did you manage to get the 'FATE' trailer to play?
Looked pretty good, made me curious.
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Dagnabbit! Still can't get this stupid thing to play. what the hell am I doin' wrong?