Media Texture is black in HTML5 Packaged project

I have a project which needs to be packaged with a video in HTML5.
But the issue is, the media texture remains black. (After packaging, in editor everything is fine)
I have set the video-files in content/movies and changed the filepath to relative.
Are there any other ideas I could test?

Greetings,

GerardM

There is currently no media player plug-in available for HTML5, so that target platform is not supported right now, sorry.

That is really ridiculous, I mean it’s 2016.
Is there no work-around available?

A feature request was entered for this by gmpreussner: [UE-35419][1]

Unreal Engine Issues and Bug Tracker (UE-35419)