Basically find below your chosen video in youtube
For this example:
The Beatles - Abbey Road Medley "Restored" Version
1 Find Share, if you can’t see Share, scroll down until you see writing below the video
Left Click the Share Arrow under the chosen video
2Left Click Copy this copies the link
Open or go to your email
When in email3 Right Click your mouse and
Paste the link into the email
Something like this:
-https://www.youtube.com/watch?v=dcv1EFoaX-8
The video picture may not show in your email, as long as the link is there, that's all I need