Could you try it in Firefox and tell me whether it works there?
@mcfate OK Firefox works, but hen I get this:
There seems to be a problem adding the video-file to the player. This is most likely due to a codec-problem. Try converting it to a compatible HTML5 codec, remove the currently attached file and re-add it. If the codecs are fine, check the error log of the server and the base URL in the settings.
@th3j35t3r @mcfate Thank you! Will do.