Display demo video in README

This way, users can have a chance to have a quick preview of odo.

README.md

@@ -25,7 +25,10 @@ It is an implementation of the open [Devfile](https://devfile.io/) standard, sup
 
 Learn more about the features provided by `odo` on [odo.dev](https://odo.dev/docs/overview/features).
 
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+### Demo
+
+[//]: # (URL obtained using the preview URL generated by GitHub from the source video in /docs/website/static/video/odo-preview-with-podman.hd.webm - see https://github.blog/2021-05-13-video-uploads-available-github/)
+[odo demo.webm](https://github.com/redhat-developer/odo/assets/593208/815f77a2-be43-4763-961b-204c88fb2cce)
 
 ### Installing `odo`