Update README.md

Author: stephencelis

README.md

@@ -60,7 +60,7 @@ The Composable Architecture was designed over the course of many episodes on [Po
 You can watch all of the episodes [here](https://www.pointfree.co/collections/composable-architecture), as well as a dedicated, multipart tour of the architecture from scratch: [part 1](https://www.pointfree.co/collections/composable-architecture/a-tour-of-the-composable-architecture/ep100-a-tour-of-the-composable-architecture-part-1), [part 2](https://www.pointfree.co/collections/composable-architecture/a-tour-of-the-composable-architecture/ep101-a-tour-of-the-composable-architecture-part-2), [part 3](https://www.pointfree.co/collections/composable-architecture/a-tour-of-the-composable-architecture/ep102-a-tour-of-the-composable-architecture-part-3) and [part 4](https://www.pointfree.co/collections/composable-architecture/a-tour-of-the-composable-architecture/ep103-a-tour-of-the-composable-architecture-part-4).
 
 <a href="https://www.pointfree.co/collections/composable-architecture">
-  <img alt="video poster image" src="https://i.vimeocdn.com/video/850265054.jpg" width="600">
+  <img alt="video poster image" src="https://d3rccdn33rt8ze.cloudfront.net/episodes/0069.jpeg" width="600">
 </a>
 
 ## Examples