How do I embed a Youtube video in a post?

[The Chilli Geeks]

Morning guys,
 
I'm having a bit of a moment and have forgot .... 
 
The title says it all really, how do I embed a Youtube video in a post?

 

[Scovie]

I copy and paste the address from the address bar into the reply window here.

 

[Guatemalan Insanity Pepper]

 

[hogleg]

           

 

[The Hot Pepper]

Yes paste the video URL.