问题
I wanted to post this question and answer because I wasn't able to find it anywhere.
So if you are playing with HTML5 <video> on the different browsers make sure the rest of your HTML is valid such that your video will play on IE9.
The following code works on Chrome 19, Firefox 12, Opera11, as well as iOS5 but NOT IE9:
<video controls="controls">
<source src="video.mp4" type="video/mp4" />
<source src="video.ogg" type="video/ogg" />
Your browser does not support the video tag.
</video>
回答1:
First check whether your browser support HTML 5 Video or not
Check browser supporting video or not
回答2:
To get it to play on IE9,
You need this full markup:
<!DOCTYPE html>
<html lang="en">
<head></head>
<body>
<video controls="controls">
<source src="video.mp4" type="video/mp4" />
<source src="video.ogg" type="video/ogg" />
Your browser does not support the video tag.
</video>
</body>
</html>
来源：https://stackoverflow.com/questions/10744438/html5-video-plays-on-all-browsers-except-ie9