m4v

Twenty-eight M4V videos, from 4 KB to 46 KB, with H.264 video and AAC audio where sound is present. M4V is Apple's variant of MP4, used by iTunes and the Apple TV app, and it can carry copy protection, though these files have none. Many systems treat it as plain MP4 and some do not recognise the extension at all. That makes it a subtle test: the content is the same as an MP4, but the name and MIME type (video/x-m4v) are different. Check that your site accepts it, plays it, and creates thumbnails. Seven resolutions and two durations are included.