Add links to video overviews

datacenter/dtr/2.2/guides/user/manage-images/scan-images-for-vulnerabilities.md

@@ -4,6 +4,8 @@ description: Learn how to scan your Docker images for vulnerabilities.
 keywords: docker, registry, scan, vulnerability
 ---
 
+[![Image Security Scanning](../../images/scanning_video.png)](https://www.youtube.com/watch?v=121poCB0Nn8 "Images Security Scanning"){:target="_blank"}
+
 Docker Trusted Registry can scan images in your repositories to verify that they
 are free from known security vulnerabilities or exposures, using Docker Security
 Scanning. The results of these scans are reported for each image tag.

datacenter/ucp/2.1/guides/user/secrets/index.md

@@ -4,6 +4,8 @@ description: Learn how to manage your passwords, certificates, or other secrets
 keywords: Docker, UCP, secrets, secrets management
 ---
 
+[![Secrets](../../images/secrets_video.png)](https://www.youtube.com/watch?v=8CaiJ9uZEk8 "Working with Secrets"){:target="_blank"}
+
 When deploying and orchestrating services, you often need to configure those
 services with sensitive information like passwords, TLS certificates, or
 private keys.