Today I added the following to
https://wikispooks.com/wiki/CIA/Drug_trafficking :
{{YouTubeVideo
|code=UT5MY3C86bk
}}
This adds a YouTube Video, with no caption, and default size and alignment.
For more options, you can go to
https://wikispooks.com/wiki/Template:YouTubeVideo
If you find a great YouTube video, I recommend this as a way to liven up
pages which are full of text.
Robin