Madsonic Support

Anyone have any idea why when I enable html5 i lose local video playback on the web interface on the mac ? I am enabling html5 because when I do my shared audio links play nicely with artwork showing on most platforms. But enabling html5, i seem to then i lose video on the Madsonic web interface playback .. can't I have both ? The error I get when playing back video on the web interface is : Error loading player:
No playable sources found .