I think you mean 15.8 cr views here! Let me explain what happens in JioCinema. Look, basically, streaming cricket or any sport is a business for the streaming platform as it gets them ads.
For Jio cinema, there is no third party counting those views, like YouTube or TRP for television, so the number can be inflated. This is done to attract more companies to give their advertisements to Jio Cinema so that they can charge more money for the ads.
To be able to do this without raising any questions, Jio Cinema follows a smart practice. Unlike Hotstar, which used to show the number of people currently watching the match, Jio shows how many times someone opened the link to view the match. So if you were watching the match, you left the app to do something and opened it again after 10 minutes, it will count that as 2 views. If you open it in 2 different tabs but only watch it once, it will show 2 views. That is how they reach such inflated numbers.