i have looked at your example http://jkreativ.jegtheme.com/flat/
the ideo is not playing in IE 11. it is reverting back to the image.
other templates have seen this issue and resolved it with
Mp4 Video (required)
Upload Mp4 video (*.mp4). Mp4 works in Internet Explorer and Webkit browsers like Safari, Chrome or Opera (since v.12).
Webm Video (required)
Upload webm video (*.webm). This is alternate video source for Mozilla Firefox browser.
maybe you can add a mp4 option 🙂 hope this work as we all need this working asap