Fix the video link

Author: barelyknown

README.md

@@ -2,11 +2,9 @@
 
 Emoji-reaction practice application, written in Ember Octane by [@milindalvares](https://twitter.com/milindalvares) and [@barelyknown](https://twitter.com/barelyknown) for a lightning talk at EmberFest 2019 in Copenhagen, Denmark.
 
-Here's the video!
+[Here's the video (on YouTube)!](https://youtu.be/y3rXwPvn7Cw)
 
-<iframe width="560" height="315" src="https://www.youtube.com/embed/y3rXwPvn7Cw" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
-
-...and some screenshots from the app.
+...and some screenshots from the presentation and app.
 
 ![screenshot 0](public/screenshot-0.png)