An embed code for a YouTube video can be used with the Custom HTML Widget on a page to embed videos.
Instructions
Navigate to your video on YouTube
Locate and click the Share button:

Click the Embed button:

Click the Copy button to copy the embed code for use on a page:

Make adjustments to the Embed Options, if needed:

Start At: Choose to start the video at a time other than the very beginning
Show Player Controls: Select to display the video controls, including Pause, Volume, and other playback options
Enable Privacy-Enhanced Mode: YouTube will not store information about visitors on your website unless they play the video