Using YouTube Videos

To use a YouTube video, you must use the "embed" version of the video's url.  These come in the format "https://www.youtube.com/embed/AAAA", where AAAA is replaced by the video's unique code.  The easiest way to find this link is to click on the "Embed" option on the video's YouTube page (right next to "Share", below the video), and find the "src" field in the code that opens.  That process is depicted below.

It is also necessary to use a splash image for all YouTube videos, even if the webform does not technically require them.  A video without a splash image will simply not appear on the page.

The highlighted text is the proper url.