How to download app on Android TV?
Obviously, You can download apps from Google Play Store on Android TV, however the problem is that many apps for TV are not available in Google Play Store, let's understand why, not all Android phone apps are available in TV, that is because Google has set a lot of requirements on TV leanback apps, if an app doesn't meet it, it is not shown in Google Play Store.
Download Google Chrome browser to Mi Box/Android TV
If you search Chrome on TV's Google Play store, you will find out that it's not there, so we'll need to sideload install it to your Android TV Mi Box. here is a tutorial video about how you can do it.