You are completely wrong. First you need to understand about 3d. Its consist of two images each one for each eye. No one will telecast blurred image. It doesnt work in that way. Only Anaglyph 3d its possible with single image. According to my knowledge there are half SBS, Full SBS, top/bottom. So it is the only way you can enjoy 3d movies. and you should have 3dtv which have option to select 3d. youtube is different in these cases. i am talking abot bluray disc and tv broadcasting.
There is no way if you play a 3d movie in 2d tv its gonna be 2d movie. Do you know you cant even play 3d bluray disc with 2d tv. picture wont come. Even if you want to watch 3d movies in 2d mode you need to have 3dtv , where there is a option to select to watch in 2d mode. You cant watch 3d movie in 2d with normal 2dtv.