Hi IndianClassicalMusic! Welcome to MB ! This is just a quick answer to your question because I'm about to leave for work.
1. Copy and paste the address of the YouTube clip you want:
https://www.youtube.com/watch?v=pNF7jcUq-yM
2. Remove everything except the code after equals sign :
pNF7jcUq-yM
3. Inside square brackets, write
youtube. Put this in front of the code. After the code, write
/youtube, also in square brackets.
Good luck, and I hope you post us some interesting music !!