Share contents between my Galaxy Note 5 and Samsung Smart TV

I used to have a Samsung Galaxy Note 3 a few years ago, I remember I could connect my phone with my 8880 Samsung Smart TV. This connection was two way, I used screen mirroring so I could display phone contents on the TV, and I could watch TV programs on my phone. I even remember once my wife was watching TV and I watched another program on another channel using my phone (connected to TV). Unfortunately I can't remember the application names which provided these features. Its now two years that I have changed my phone with a Galaxy Note 5, and I have done all the upgrades. The problem is I can not do what I did with the old version of mobile set. I believe I don't have the applications, and I can't remember their names. By the way is there any way so I can screen mirror a video played using streaming (is not on my phone but it is online) on my TV? Because Samsung Smart View application just shares contents (videos/photos/music) which are stored in my gallery.