![]() ![]() It then starts the full download when you press play. However, I have discovered that Firefox does perform multiple loads of the video file – it is reliably running 3 partial downloads of around 30 kilobytes when the page loads (presumably it needs to do one of these to provide a preview image, the jury is out on the other two). So please bear this in mind when reading this article. Update! After having been given a decent demo page by Bruce Lawson to test these findings, it looks like the major problems found below are largely down to the JavaScript libraries people are using with their HTML 5 videos. Previous updates and original article follows. ![]() ![]() * I kid you not… the developer tools showed the MP4 was downloaded for Safari and Chrome browsers… although the developer tools utterly suck compared to Opera Dragonfly and Firefox Firebug and even look bad compared to the IE Developer Tools (which look a bit old school and sometimes don’t behave very well). Tested using the Bruce Lawson: HTML5 Video Embed Fall-back. Update! Here are the results of a full test using a mark-up only HTML5 video demo from Bruce Lawson.
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