I have an IPhone, and when I watch YouTube on it, I can stream the video directly to my Smart TV. Since playing YouTube videos directly on Smart TV YouTube app is unpractical, I wondered If I could connect my Laptop with my Smart TV.
And I did it with a help of Google Chrome. I knew that Google Chrome has developer option, in which you can set the rendering of the web page for some mobile and tablet devices.
So in Google Chrome go to Tools – Developer Tools.
press 
Press Emulate
Restart Chrome, open YouTube and in the upper right corner of video press Stream to TV.
Good Luck
Nice advice