Added a link to video in README.md (#1)

MaryLynJuana · tshemsedinov · commit 97e722f0ef06 · 2019-01-22T20:29:56.000+02:00
diff --git a/README.md b/README.md
@@ -1,2 +1,3 @@
-# Collections
-Different types of Associative Collections
+# Different types of Associative Collections
+
+[![Коллекции, множества, хештаблицы](https://img.youtube.com/vi/hN0wsq5LNOc/0.jpg)](https://www.youtube.com/watch?v=hN0wsq5LNOc)
