{% include elements/video.html id="aZNbUITN-mA" %}

How to get a YouTube video ID?
The video ID is located in the URL of the video page, right after the v= URL parameter.
In this case, the URL of the video is: https://www.youtube.com/watch?v=aZNbUITN-mA.
Therefore, the ID of the video is aZNbUITN-mA.