Unofficial "dual audio" files often have compressed video (artifacts) or poorly synced audio.
This is where the exact keyword shines. Public and private trackers are filled with 720p dual audio releases. However, "better" is rare. Recommended search terms on torrent sites: Unofficial "dual audio" files often have compressed video
Purchasing a digital copy allows you to download the movie for offline viewing in 720p or higher. Many of these platforms offer "Dual Audio" by providing multiple audio tracks that you can switch between in the settings. Amazon Prime Video Unofficial "dual audio" files often have compressed video