Adding a YT playlist explaining Heap Data Structure (#8640)

This playlist explains Heap in a concise way. Explaining how to approach a Heap problem and moreover how to identify it first.

courses/free-courses-hi.md

@@ -178,6 +178,7 @@
 * [DSA-One Course- The Complete Data Structure and Algorithms Course](https://www.youtube.com/playlist?list=PLUcsbZa0qzu3yNzzAxgvSgRobdUUJvz7p) - Anuj Bhaiya (YouTube)
 * [Functions and Arrays - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHOV7lm2uSw4ZiVsIRsGS6r) - Pepcoding
 * [Graph Data Structure & Algorithms Full Course In Hindi](https://www.youtube.com/playlist?list=PLzjZaW71kMwSrxEtvK5uQnfNQ9UjGGzA-) - Hello World
+* [Heap Playlist Interview Questions Coding Tutorials Data Structures](https://youtube.com/playlist?list=PL_z_8CaSLPWdtY9W22VjnPxG30CXNZpI9) - Aditya Verma 
 * [Java + Data Structures + Algorithms](https://www.youtube.com/playlist?list=PLKKfKV1b9e8ps6dD3QA5KFfHdiWj9cB1s) - Apni Kaksha
 * [Java + DSA](https://www.youtube.com/playlist?list=PLfqMhTWNBTe3LtFWcvwpqTkUSlB32kJop) - Apna College (YouTube)
 * [Linked Lists - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiF5VZmktfqW6WVU1pxBF6l_) - Pepcoding