Add example video link/thumbnail to readme

.gitattributes

@@ -1,3 +1,4 @@
 *.pbxproj -text
 # specific for windows script files
-*.bat text eol=crlf
+*.bat text eol=crlf
+docs/assets/example-01.mp4 filter=lfs diff=lfs merge=lfs -text

README.md

@@ -33,6 +33,14 @@
 
 ## Examples
 
+<div align="center">
+
+<a href="https://www.youtube.com/watch?v=npALr9IIDkI" target="_blank" rel="noopener noreferrer">
+  <img src="./docs/assets/rnaa-example-01-thumbnail.png" width="640" />
+</a>
+
+</div>
+
 The source code for the example application is under the [`/apps/common-app`](./apps/common-app/) directory. If you want to play with the API but don't feel like trying it on a real app, you can run the example project. Check [Example README](./apps/common-example/README.md) for installation instructions.
 
 ## Your feedback