It depends how "smart" your tv is. Almost everything uses what is called DLNA to accomplish this. If the TV supports it and you load a player on some device in your house you can send video to the TV. There are some basic video players are are free. There are of course limitations but if you have the video content on the PC itself you can likely stream it to a DLNA compatible TV. It would get tricky to stream content from the internet and then forward it to the TV mostly because of copyright protect.