Flowplayer stream not found (Playlist filename empty)

Hello,

i do have a clean installation of flowplayer api and video 6.x-4.2. All of my videos do autostart, although
at "/admin/settings/video" the "Automatically start video on page load" is not checked. If I do or even don't change anything on the video settings page "/admin/settings/video" and click on the save button, the flow player can't find any videos (200 Stream not found). The only way to get the flowplayer videos working again, is to reset the settings to default (the right button). If I do change the settings, the jquery command will be extended by the "playlist" option and the playlist-file is missing:

jQuery.extend(Drupal.settings, { "basePath": "/", "flowplayerSwf": "sites/all/modules/custom/flowplayer/flowplayer/flowplayer.swf", "flowplayer": { "#video-plain": { "playlist": [ "http://www.mydomain.tld/sites/default/files/", { "url": "http%3A%2F%2Fwww.mydomain.tld%2Fsites%2Fdefault%2Ffiles%2Fvideos%2Fvideo.flv", "autoPlay": 0, "autoBuffering": 0 } ], "clip": { "scaling": "fit" } } }, "ddblockContent": { "1": { "block": "1", "contentContainer": "div.slide", "custom": "", "fx": "fade", "height": 195, "next": 0, "overflow": "hidden", "pager": "number-pager", "pagerEvent": "click", "pagerContainer": ".custom-pager-item", "pause": 1, "setDimensions": "custom", "slideTextPosition": "left", "slideTextContainer": "div.slide-text", "slideTextEffectBefore": "fadeOut", "slideTextEffectBeforeSpeed": 1000, "slideTextEffectAfter": "fadeIn", "slideTextEffectAfterSpeed": 1000, "speed": 1000, "timeOut": 10000, "width": 195 } } });

Best regards,
root66