One of the few apps that could play an MKV video for me, with the added benefit of accurate Bluetooth audio and a higher volume level than other apps. I also found it's one of the few that asks for permission to access external devices like Bluetooth headphones. I think that helps ensure smooth audio through them and allows the video codecs to play correctly. I've tried other apps, and they either wouldn't open the video or would open it but the sound was either inaudible or choppy. Infuse has excellent codecs and is well-updated, which is why it works so smoothly for me. Not to mention that the minimized player option is quite useful too! Highly recommended; I've been using it for years, and it's still fantastic!