<video src="big_buck_bunny_trailer_480p_high.mp4" controls preload="metadata" onerror="videoFail(this)">...</video>
<video src="big_buck_bunny_trailer_480p.webm" controls preload="metadata" onerror="videoFail(this)">...</video>
<video src="big_buck_bunny_trailer_480p_baseline.mp4" controls preload="metadata" onerror="videoFail(this)">...</video>
The example videos shown here were created from the 480p QuickTime trailer at Big Buck Bunny.
The H.264 baseline profile example is provided for mobile devices which may not support H.264 high profile. A description of H.264 profiles can be found at http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Profiles.