Which video format(s) should a webapp serve?

Posted by NoozNooz42 on Stack Overflow See other posts from Stack Overflow or by NoozNooz42
Published on 2010-05-02T17:52:00Z Indexed on 2010/05/02 17:58 UTC
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webapp

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video

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video-encoding

I need to put up a few videos on a Webapp and I'm a bit lost. My requirements are:

DRM is not a concern at all
it should work on the iPhone (and iPad) and on the main browsers (Safari, Internet Explorer, Firefox, Opera).
it is not a problem at all if the video doesn't play on Linux (because it's a video/screencast of a Windows/OS X software targetted at, well, Windows and OS X users)
it is not a problem at all if it also works on Linux (I'm a Linux user myself)

Can a unique format be served (like H.264) and play without any additional work on my part or do I need to convert the videos to different formats and have the webapp serve different video formats depending on the browser used?

Should I use the "video" tag of HTML5 when I detect an HTML5 capable browser?

What's the "safest" bet here? I take it that Flash is out of the equation seen that iPhone/iPad is a requirement.

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