diff --git a/src/data/roadmaps/angular/content/101-rxjs-basics/102-marble-diagrams.md b/src/data/roadmaps/angular/content/101-rxjs-basics/102-marble-diagrams.md
index 14b23e22c..adc12e64c 100644
--- a/src/data/roadmaps/angular/content/101-rxjs-basics/102-marble-diagrams.md
+++ b/src/data/roadmaps/angular/content/101-rxjs-basics/102-marble-diagrams.md
@@ -6,3 +6,5 @@ Visit the following resources to learn more:
 
 - [Understanding Marble Diagrams for Reactive Streams](https://medium.com/@jshvarts/read-marble-diagrams-like-a-pro-3d72934d3ef5)
 - [Interactive Diagrams](https://rxmarbles.com/#from)
+- [How to Read RxJS Marble Diagrams](https://www.youtube.com/watch?v=m6jkzIHMEdg)
+- [Observables Part 4 - Marble Diagrams](https://www.youtube.com/watch?v=wXcPenSfdo0)