How does YouTube playback different movie formats?

2 replies [Last post]
JAC
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Joined: Aug 28 2001

How does YouTube, MySpace and other such sites playback movies submitted in different file formats. For example, they say movies can be submitted as Quicktime, AVI, WMV, MPEG4 and so on.

Do they re-encode them? When I right-click on the movie it says Flash Player, is this able to play back multiple formats?

Finally what would you suggest are the best format settings for submitting a movie, data rate etc.

Thanks
JAC

PaulD
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Joined: Aug 31 2002
JAC
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Joined: Aug 28 2001

Thanks Paul, all that was very helpful.