add youtube link for 102

fishercoder1534 · fishercoder1534 · commit 61bd37e0a95d · 2020-03-05T06:36:26.000-08:00
diff --git a/README.md b/README.md
@@ -807,7 +807,7 @@ _If you like this project, please leave me a star._ &#9733;
 |105|[Construct Binary Tree from Preorder and Inorder Traversal](https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_105.java)|  |Medium| Recursion, Tree 
 |104|[Maximum Depth of Binary Tree](https://leetcode.com/problems/maximum-depth-of-binary-tree/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_104.java)| [:tv:](https://youtu.be/dvmoHr5cN80) |Easy| DFS
 |103|[Binary Tree Zigzag Level Order Traversal](https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_103.java)| |Medium| BFS,DFS
-|102|[Binary Tree Level Order Traversal](https://leetcode.com/problems/binary-tree-level-order-traversal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_102.java)|  |Medium| BFS
+|102|[Binary Tree Level Order Traversal](https://leetcode.com/problems/binary-tree-level-order-traversal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_102.java)| [:tv:](https://youtu.be/sFDNL6r5aDM) |Medium| BFS
 |101|[Symmetric Tree](https://leetcode.com/problems/symmetric-tree/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_101.java)| [:tv:](https://www.youtube.com/watch?v=F85boSPtfKg)|Easy| DFS
 |100|[Same Tree](https://leetcode.com/problems/same-tree/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_100.java)|  [:tv:](https://www.youtube.com/watch?v=2Pe6e0KbgFI)|Easy| DFS
 |99|[Recover Binary Search Tree](https://leetcode.com/problems/recover-binary-search-tree/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_99.java) |  |Hard |
