What is the best video format to use with Dreamweaver CS5.5

Question

My client has asked what format to convert their video to before sending it to me to be placed on their homepage. I'm using DreamWeaver CS5.5 with an HTML5 template - trying to steer clear of Flash for this new site. On other sites, I embed videos from their hosting site (YouTube, SchoolTube, etc).
My question to the forum is what is the best way (and prefered format) now days to insert a video onto a webpage using DreamWeaver CS5.5 and HTML5. I have the Adobe Web Premium package.

Answer 1

In the chapter on video in Dive Into HTML5 it says this:
There is no single combination of containers and codecs that works in all HTML5 browsers.
This is not likely to change in the near future.
To make your video watchable across all of these devices and platforms, you’re going to need to encode your video more than once.
And a suggested workflow:
For maximum compatibility, here’s what your video workflow will look like: 
Make one version that uses WebM (VP8 + Vorbis).
Make another version that uses H.264 baseline video and AAC “low complexity” audio in an MP4 container.
Make another version that uses Theora video and Vorbis audio in an Ogg container.
Link to all three video files from a single <video> element, and fall back to a Flash-based video player.
I think that your starting point is to consider your target audience.
Martin
http://diveintohtml5.info/video.html