Update README.md

Author: GouravRusiya30

README.md

@@ -142,10 +142,10 @@ Check out ---> [Sample PR](https://github.com/codedecks-in/LeetCode-Solutions/pu
 
 ## Hash Table
 
-| # | Title | Solution | Time | Space | Difficulty | Tag | Note |
+| # | Title | Solution | Time | Space | Difficulty | Tag | Video Explanation |
 | --- | ------------------------------------------------------------- | --------------------------------- | ------ | ------ | ---------- | --- | ------------- |
 | 001 | [Two Sum](https://leetcode.com/problems/two-sum/)| [Java](./Java/two-sum.java) <br> [Python](./Python/1_TwoSum.py)|_O(N)_|_O(N)_|Easy|||
-| 242 | [Valid Anagram](https://leetcode.com/problems/valid-anagram/) | [Java](./Java/valid-anagram.java) | _O(n)_ | _O(1)_ | Easy | | Unicode chars|
+| 242 | [Valid Anagram](https://leetcode.com/problems/valid-anagram/) | [Java](./Java/valid-anagram.java) | _O(n)_ | _O(1)_ | Easy | | [Tutorial](https://www.youtube.com/watch?v=sbX1Ze9lNQE) |
 | 146 | [LRU Cache](https://leetcode.com/problems/lru-cache/) | [Java](./Java/LRU-Cache.java) | | | Medium | | |
 
 <br/>