Do not include secure connection like https, only http (without the s), just strip the 's'.
Add the original descriptional titel of that video, as is on the original video website, even if it is a badly designed title
Add additional information about that video if required or desired.
Best if You can supply an alternative links because links get outdated all too easily, and sites like YouTube often put restrictions on videos like "this content not available in your country". So, if You think, the video You liked to show has value for more than a month, make it easy for later "generations" to find it in other places.
Here is a nice little video about the advantages of Wiki over e-Mail for organizing group activities:
called: "Wikis in Plain English" from the channel "Common Craft" uploaded on 29 May 2007. Duration: 3'53"
About: "http://commoncraft.com A short explanation of wikis and how they can be used to coordinate a group. This video comes in an unbranded 'presentation quality' version that can be licensed for use in the workplace."