In order to embed a youtube video in your page, you're gonna have to use this model in your page. {{youtube|YoutubeID|width|description = Description }}
What do the stuff here mean?
{{youtube}} - is used to call upon the template of this page that can be used everywhere, you need it in order to embed a youtube video. YoutubeID - A youtube video link looks like this https://www.youtube.com/watch?v=Nb368f3UdqI what you need is the alphanumerical code after the = , which in this case would be Nb368f3UdqI width - it's the size you want the embed to be, I recommend using 720 description - Used to describe the video
This is how the final result would look like if used correctly
