If you hold the file, you hold the arrangement. Use it respectfully, credit the songwriter, and for god's sake—turn off the quantization. Let it breathe.
Karaoke versions of deep cuts are expensive. Using the MIDI file, a hobbyist can mute the "melody track," load a soundfont (like a Yamaha Grand Piano), and export a backing track in 10 minutes. Clown -Emeli Sande- MIDI.MID