It doesn't just *have* to be your TV that is compatible. If you have a PS3, for example, you can stream videos from your device to the PS3 wirelessly via DLNA. Some newer TVs, web-streaming boxes, and even some DVD/Bluray players also support this protocol.
I have personally never used it, so I'm afraid I'm not much help in advising how to set it up, but as long as both devices are on same WIFI network it should be pretty easy. I'd probably google "Samsung Galaxy S3 DLNA" to get a better idea....