Hi Klaus,
The current version (1.17) of krpano.js does not support equirectangular panos, and consequently the video player plugin does not support it either, so to get around this limitation I would like to suggest that you add support for cube-mapped panoramic video, or add a WebGL switch that allows equirectangular panos and pano-videos to be rendered in the HTML5 player. Do you have any comments around this idea?
Regards,
Fred.