Most users searching for dual audio content watch on laptops, tablets (iPads), or 32-inch TVs. On a 14-inch laptop screen, the human eye cannot perceive the difference between 720p and 1080p. You get 90% of the visual fidelity at 30% of the file size.
For a 720p "dual audio" version, you are likely looking at a high-definition rip or digital stream designed to balance quality with file size. The Next Three Days Dual Audio 720p
: At 720p, you can expect a smooth viewing experience with lower data usage compared to the full 1080p Blu-ray's 28 Mbps. The Next Three Days (2010) Most users searching for dual audio content watch