I remember this was an issue but need to know if meanwhile there is a solution to use a video plugin with an absolute url to the video source like
Code
<plugin name="video1" posterurl="panos/p1/poster.jpg" url="plugins/videoplayer.swf" alturl="plugins/videoplayer.js" keep="true" visible="false" alpha="0" videourl="http://video.url.de/path/source_1280x720_720p.mp4" align="center" x="0" y="0" width="100%" height="100%" pausedonstart="true" loop="false" volume="0" preload="true" buffertime="0.1" ignoremetadata="false" updateeveryframe="true" onvideoready="" onvideopaused="" onvideocomplete="trans_loadscene_2();" onunsupported=""/>
Thank you
Jürgen