The India squad for the upcoming two Tests against the Black Caps was announced on Friday – a day after the T20 side was announced.
Bangar will replace Mike Hesson who was managing the role in addition to being the Director of Cricket Operations at RCB.
BCCI on Tuesday announced a 16-member squad for the T20I series against New Zealand at home, starting from November 17.
Ravi Shastri signed off from his four-and-a-half-year tenure as Indian men's head coach as an "emotional, but a very proud man".
The previous highest-watched T20 game was the 2016 T20 World Cup semifinal between India and West Indies, which drew 136 million viewers.
Half-centuries from Rohit Sharma and KL Rahul helped India reach their target with 28 balls to spare to give departing head coach Ravi Shastri a winning send-off.
Former Pakistan fast bowler Shoaib Akhtar stated that his "heart's wish" is for India to reach the final and for Pakistan to win against them.
India demolished Scotland in Dubai, tying them in knots with the ball before chasing down the target astutely to enjoy a huge net run rate gain boost.
Virat Kohli will be eager to lead Team India on to another win against Scotland, following a tremendous performance against Afghanistan.
Virat Kohli turns 33 on November 5 and although he is undergoing some tough times, he is still one of the greatest cricketers in the modern era.