Just looking to learn if it is possible to use the new HTML 5 "video" tag?

In particular, I'd like to modify the HTML code to use this new "video" tag so that webbrowsers will "autoplay" all *.m4v, *.webm *.mp4 videos.

I'm interested in doing this b/c I can't get any of these webbrowsers (FF, Opera, IE9, Chrome) to "autoplay" these formats.

If anyone has any ideas, please advise.

BTW, in an effort to get my webbrowsers to play these formats, I have modified two files:

AddType video/m4v .m4v
AddType video/webm .webm
AddType video/mp4 .mp4

I also checked this file: /etc/mime.types
these 3 entries exist:

video/m4v .m4v
video/webm .webm
video/mp4 .mp4

Lastly, current HTML code from MythWeb just provides a hyperlink:

So I'd like to change this so that I can stream a movie to any device whether it be an iPad, iPhone, Android based device, or to a PC based Webbrowser.

Here's an example of what I like to see Mythweb Video contain in the HTML source code:
<video width="720" height="352" controls autoplay>
  <source src="mymovie.mp4"  type="video/mp4; codecs=avc1.42E01E, mp4a.40.2">
  <source src="mymovie.webm" type="video/webm; codecs=vp8, vorbis">
  <source src="mymovie.m4v"  type="video/m4v; codecs=h264, aac, ac3">
If this new HTML 5 code could be inserted into Mythweb Video, it could stream movies to any device and they would "autoplay". And yes, I plan to have multiple copies of the same movie in the various formats so that any device can stream the movie.