Thank you for reporting this issue. It appears that JW Player 5.x will not work any longer with YouTube and TubePress, as it relies on Flash, and YouTube has largely moved away from Flash as their primary delivery medium. The next major release of TubePress (currently under development) will support JW Player 7.x, but for now unfortunately we can only recommend that you do not use JW Player 5.x with TubePress 5.×. I’m very sorry for the inconvenience! Please let us know if there’s anything else we can do for you.
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