Jwplayer 7 and Ogg
I use Jwplayer 6 for website and I stream with a file in .ogg and it's ok.
I use a new website with the VideoPro Theme Envato Market and Cactus, The Jwplayer is 7 Plugin , and the Ogg is not supported.
Why have you delete this format .ogg ?
The others players play the format .ogg and not you in v7.
Doc : 3 video file types: MP4, WebM and FLV.