docs: Add video (#323)

readme.md

@@ -19,6 +19,10 @@ Windows in a Docker container.
  - KVM acceleration
  - Web-based viewer
 
+## Video
+
+[![Youtube](https://img.youtube.com/vi/xhGYobuG508/0.jpg)](https://www.youtube.com/watch?v=xhGYobuG508)
+
 ## Usage
 
 Via `docker-compose.yml`