^ With movies though, surely a lower resolution wouldnt make a difference because the screen is only a few inches compared to the 30+ inches you would normally watch it on?
The resolution of the screen has nothing to do with the file size. The video player will automatically play at the resolution of you screen on your phone. The video file will still have the same original resolution, just compressed down...
For example (all calculations are simplified, don't fret, they're not 100% on, only an example), 1080p (1920x1080 resolution) has 2,073,600 pixels. Now, let's say that each pixel is represented by 1 bit. That would be 253kbs/frame, NTCS (because i'm from America
) runs at 29.97 (changed to 30 for ease of calculations) which would mean every second would be approx. 7mbs, every minute approx. 445mbs, every hour 25gbs,
Now if we drop the resolution down the resolution of the that of the xperia play, (854x480) you only have 409,920 pixels, which means each frame would be 50kilobytes, every minute 2.9mbs, every hour 175megabytes.
This is just a (very) rough example of what uncompressed video at 1 bit a pixel would be. With compression, and color added in it gets a whole lot more complicated.
That answer your questions?