Update README.md

tshemsedinov · web-flow · commit 47e3bb0c230c · 2019-03-02T14:27:23.000+02:00
diff --git a/README.md b/README.md
@@ -1 +1,3 @@
-# Binary Semaphore, Counting Semaphore
+## Binary Semaphore, Counting Semaphore
+
+[![Семафоры и мьютексы в JavaScript и Node.js](https://img.youtube.com/vi/JNLrITevhRI/0.jpg)](https://www.youtube.com/watch?v=JNLrITevhRI)
