Now that you have the filter actually applying the Flowplayer to that span, now let's address the connection.
From the threads I've referenced earlier, the Cloudfront service requires the URL be split up a little differently than when accessing plain ol' FMS. Does your provider, despite it not being Cloudfront, have the same situation? Refer to any documentation that your provider may have.
If you think they provision similarly to Cloudfront, then append '?provider=acf' to the URL, and the filter will adjust the netConnectionURL and clip URL properties accordingly.