If you want the highest possible quality (4K HDR), Apple is the choice. Purchasing the film here gives you a DRM-protected file that often supports multiple audio languages, which you can download to your iPad or iPhone for travel.
A: Legally, yes. The Amazon Prime Video and Netflix apps have a "Download" button. This downloads the file to your phone's internal storage encrypted for offline viewing. It is a Dual Audio file by definition because you can switch languages offline. Hitman Agent 47 Dual Audio Download
: It has lots of gunfights, car chases, and explosions. What is Dual Audio? If you want the highest possible quality (4K