1 - click the share button
2 - then click the icon that looks like <>. That is the embed code for iframes.
3 - copy the link
4 - paste link into doc, notepad, email for editing purposes
5 - remove the "autoplay" phrase from the link
6 - copy the youtube link ONLY from the string of information
See example below
Original Code
<iframe width="560" height="315" src="https://www.youtube.com/embed/tLxeyLyvw-0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
Edited Code with Autoplay Removed
<iframe width="560" height="315" src="https://www.youtube.com/embed/tLxeyLyvw-0" frameborder="0" allow="accelerometer; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
Copy Link without Autoplay
<iframe width="560" height="315" src="https://www.youtube.com/embed/tLxeyLyvw-0" frameborder="0" allow="accelerometer; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
New Link without Autoplay
https://www.youtube.com/embed/tLxeyLyvw-0
Note: The user who is viewing the video can have THEIR settings on auto-play and you cannot affect change on their settings.