Yes, JWPlayer runs on your web server but how it is configured to use playists is really outside of our support remit. As Salvadore said, you may want to investigate Wowza nDVR and playlist delegates. The benefit of this is that the streams are 'live' rather than vod so a client can request a particular part of the stream via the delegate (e.g. setting a start point to stream from via the wowzadvrplayliststart query parameter) and the stream will begin as a live stream from that point until the end of the DVR store window (or a point defined via a wowzadvrplaylistend or wowzaplaylistduration query parameter). This DVR window can be up to 30 hours in length.