How to place a link in a YouTube video by RayTheVideoGuy. This method is not the best way to link out from a Youtube video. Here is a very good explanation of why and of how to most effectively link from your video to an external website using ‘Cards’ and ‘End Scenes’.
Basically, using ‘Annotations’ to place an external link in your video only works on desktop computers.
Annotations are not appearing on mobile devices.
At the time of this update, most Youtube videos are being watched on mobile devices.
‘Cards’ and ‘End Screens’ are the way to go for placing an external link in your YouTube videos.
Note: On YouTube videos, an external link means a link to a page not within YouTube.com. Your external link can only be to a website that is verified as being associated with your YouTube account.
Thanks to RayTheVideoGuy for this great information on placing links in YouTube videos.