Can we use webTV app on s60v3 like, Nokia E63 ?
The template is targeted to N8. It uses ActionsScript 3 so it will not work on any other device. the WRT part can of course be modified to fit a smaller screen size and you can then use the native media player to play the videos. But out of the box, no.
you may try to latter version, as i am using bit up graded version and web tv apps are running fine.
Then, if your phone is listed, you know.
If by "web TV" you, on the other hand, refer to some mobile TV broadcasting technology (such as DVB-H, Digital Video Broadcasting - Handheld), then you can use the same device specification page to see if your phone is listed to support DVB-H (note that in the case of DVB-H, you would also need a DVB-H broadcasting network to operate in the area, and there are practically none, as the technology never really took off).