You'll end up with at least four clickers. One will vanish down the back of the sofa. The dog will use one as a chew toy. Just accept it.
'Tis easy. The YouTube app on the telly gives you a pairing code. Put that into the YouTube app on your phone, and you can control the vids remotely. Very handy.
We've got a 4k smart board in work instead of a chalk board and it's fab. You can throw from the ipad (my pet hate) to it, write/draw, use it as a TV/video screen and a mahoosive computer. It's made a huge change to how we use music, short clips of film, photo viewing and editing, monitoring the squirrels and birds in the trees away from the windows etc