Autoplay the demo reel but with controls

It's a GIF so I think this is ok.

content/blog/2024/jupyterhub-binderhub-gesis/index.md

@@ -35,7 +35,7 @@ It is helpful to understand that BinderHub primarily has 3 responsibilities:
 But first, a very quick demo of how this looks like right now now!
 
 <!-- generated from original .mov screen recording with `ffmpeg -i screencast.mov -c:v libx264 screencast.mp4` -->
-<video src="./screencast.mp4"></video>
+<video src="./screencast.mp4" autoplay muted controls></video>
 
 This is very much a work in progress, but the basic flow can be seen clearly. Users see a Server Options menu after they log into JupyterHub. They can specify the two primary things that determine the server configuration: