<iframe src="https://www.youtube.com/v/_YVcjNmjHik" height=325 width=545 frameborder=0></iframe> code example

Example:

<iframe width="1012" height="569" src="https://www.youtube.com/embed/ScHI1cbkUv4" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>