The phone chooses, the television plays
Find the anime on the phone, press Watch now, pick the service for your country, and use the cast icon in that service's player: Chromecast from Android, AirPlay from an iPhone, the built-in cast on Samsung and LG. The stream goes to the television in HD with the Hindi track in the same audio menu, and the phone stays free as the remote with My List open.
Television browsers and PCs
Android TV, Google TV and Fire TV's Silk browser open the site directly and the menu works with the remote; Watch now opens the anime in the service's TV app when it is installed. On a PC, any browser opens the site and the app installs from the address bar.
Subtitles at a distance
Every service's television app has a subtitle size setting; Large with a dark background box is the one to choose.