HTML template not playing video


I've been trying to create templates in HTML
so far so good, everything works except playing a webm in the video tag.

Whatever I enter as source I only get the text "No Video :(".
Both sources are next to the html. In the browser (Chrome, Chromium and FireFox) the template plays as it should.
Only not in CasparCG.

I have tried only webm, only mp4, both, external link to a sample movie. All this works in browser, nothing works in CasparCG.
I have the latest build of CasparServer (5 dec 2016) with default config (changed to 720p5000)
Am I overlooking something? Do I have to enable something in the server?

Code: Select all

    <video id="video" style="width:1280px; height:720px; color:#FFF;" autoplay loop>
      <source src="out.webm" type="video/webm">
      <source src="out.mp4" type="video/mp4">
      No Video :(