Mention copr-cli video tutorial

The direct link to the playlist is here:
https://www.youtube.com/playlist?list=PLEOLABfRmCVjhTCrxiHNE9KwDepnbhIXa

Or we can point to the documentation instead:
https://docs.pagure.org/copr.copr/video_tutorial.html#video-tutorial

Author: FrostyX

deployment/copr/copr-cli.md

@@ -7,6 +7,8 @@ subsection: copr
 
 [Copr](https://copr.fedoraproject.org/) features a command line interface that can help you with managing projects, submitting builds, etc.
 
+**Note:** A [video tutorial](https://www.youtube.com/playlist?list=PLEOLABfRmCVjhTCrxiHNE9KwDepnbhIXa) covering `copr-cli` usage is available
+
 ## Setup
 
 Install the copr-cli package: