is through legal streaming services or physical media. There is no "installer" for the movie, as it is a video file or stream, and downloading from unofficial sources is copyright infringement. Official Viewing Options in India
Collectors can buy the official Indian Blu-Ray release. Pop it into a PC with MakeMKV software, and you can install (rip) the main movie as an MKV file containing both English and Hindi DTS-HD tracks. This is 100% legal if you own the disc. avengers infinity war 2018 dual audio hindieng install