Added video to docs

Related to: https://gitlab.com/gitlab-org/gitlab-docs/-/issues/706

doc/user/project/deploy_tokens/index.md

@@ -107,6 +107,9 @@ push images to your Container Registry.
 A deploy token created at the group level can be used across all projects that
 belong either to the specific group or to one of its subgroups.
 
+<i class="fa fa-youtube-play youtube" aria-hidden="true"></i>
+For an overview, see [Group Deploy Tokens](https://youtu.be/8kxTJvaD9ks).
+
 To use a group deploy token:
 
 1. [Create](#creating-a-deploy-token) a deploy token for a group.