480p_mp4 -

Many users find the quality indistinguishable from HD on standard smartphone screens, particularly for casual viewing.

“Large monitors or TVs typically have high resolution, so a tiny 640 x 480... resolution image scaled up to 3840 x 2160 is not going to look good but chunky and very pixelated.” Quora · 4 years ago Use Cases & Compatibility 480p_mp4

On modern high-definition displays, 480p can appear blurry or pixelated because it only has about one-fourth the pixels of 1080p. However, users frequently find it "completely acceptable" on smartphone screens where the pixel density is high enough to mask the lower resolution. Many users find the quality indistinguishable from HD