Been there, and it's working just fine with my viewer...
Here is the proof.
Note that when the media filter is enabled (as it is for me), you need to accept a bunch of addresses before the TV can work. The TV script is also a bit slow (media may take a few seconds to download too), and to "touch" the screen of a media, you often (not always, depending on the media and how the TV is scripted) have to right click and choose "Touch" (or whatever the script renamed it, here "TV menu") to get the click passed through...
Finally if you can't get a media to start (it may happen, and with any viewer), remember to use the "Nearby media" floater (click on the small button with a prim and a play icon over it, in the media controls, or use the "View" -> "Nearby media" main menu entry): from there you can see all media around your avatar listed and choose which to start, stop, pause, focus, etc...
If you need more help, post the viewer log.