I installed active-tv on my PC and open the defined ports+allowed access to applications as adviced. If I try to open any movie from youtube, it says that it is unable to open this type of media - please try again later. The same happens both on the device and on PC. Also, most channels will not open. It just shows the wait animated circle forever.
To add more info to this, none of the online channels works. They all give unable to play this file message. Only files stored on PC can be played. All the rest (Online tv, online channels, etc.) are totally useless.