I'm using v2.10.3 of MediaElement with WordPress 3.5.1.
My problem is that a video embedded with MediaElement isn't playing on iPhones (in Safari, I guess). As one iPhone 4 user put it, "the video screen has a strike-through image on it".
However it works correctly in the browsers I've tested on Windows (IE, FF, Chrome) and, according to other people, on Macs. It also worked in the iPhone 4 emulation in Adobe Device Central, for what it's worth.
The URL is http://www.iainmorland.net/showreel (about half way down, under "Sound Editing to Picture")
The video itself is an mp4 file with H.264 video and AAC audio. It's 36MB.
The code that I am using is
[video src="http://www.iainmorland.net/wp-content/uploads/2013/05/Driving_Through_Snow.mp4" preload="none" width="400" height="320"]
Can anyone help? Have I made a mistake in the code or video format?