Concept of Chess in Hindi.What is Castling, Stalemate, En Passant, etc...?Rules of Chess.Chess moves

In this video I explained the above questions and their answers:
1.Check देने पर क्या Check बोलना जरूरी हैं ?
2.End Game मैं अगर सिर्फ राजा ही बच जाय तो उसे कितनी moves मैं checkmate करना compulsory हैं?
3.What is Castling ?
4.What is Stalemate?
5.What is en passant?

I hope this video is knowledgeable for you