TKaraokeUSB

The ultimate karaoke player for your Android TV. Plays virtually any song format (mkv, mp4, vob, avi, m4v, mpg, etc..) and controllable from your phone or tablet.

The USB edition loads songs from your external USB hard drive. No song server running on a computer is required.

Features:
Support 4K songs (requires 4K-capable devices)
Support voice search (in English or Vietnamese)
Play virtually any song format
Specifically designed for karaoke users
Control via a mobile app connected to your wifi

Note that the free version limits to 1000 songs.