Add some more resources

Author: brentvatne

docs/more-resources.md

@@ -6,9 +6,13 @@ sidebar_label: More Resources
 
 # Talks
 
-- [Mobile Navigation at React Alicante](https://www.youtube.com/watch?v=GBhdooVxX6Q): An overview and comparison of the approaches taken by react-native-navigation and react-navigation: [watch here].
+- [Mobile App Development with React Native at Harvard Extension School](https://cs50.github.io/mobile/lectures): Lecture 6 covers React Navigation, includes exercises, slides, and video.
 
+- [Mobile Navigation at React Alicante](https://www.youtube.com/watch?v=GBhdooVxX6Q): An overview and comparison of the approaches taken by react-native-navigation and react-navigation.
 
-- [Owning Transitions at React Native EU](https://www.youtube.com/watch?v=1LKqGx3z0W4): Talk about a new transitioner API and how to use it.
+
+- [Owning Transitions at React Native EU](https://www.youtube.com/watch?v=1LKqGx3z0W4): Discusses a new transitioner API and how to use it.
 
 - [It all starts with navigation at React Native EU](https://www.youtube.com/watch?v=Z0Jl1KCWiag): Explains the evolution of React Native navigation libraries over time and the problems that required building native APIs to solve and what those solutions were.
+
+- [React Navigation at React Amsterdam](https://www.youtube.com/watch?v=wJJZ9Od8MjM): An introduction to React Navigation.