Android Videos quality setting

Hi guys,

I'm working on a simple Android project in unity of course. I have few videos that I need to import into the project, I have already converted them into .mpg4, and istalled quicktime, and imported them successfully into unity. Here is my question what exacly is the effect of the quality bar in the video import setting.

If I change the quality to 0.0 it changes the dimension of the file making it smaller, if I put it on 1.0 it makes bigger, I know the result of the quality but then when I build my App. The APK file have always the same dimension even if all the videos are on 1.0 quality or 0.0 quality, so how it is effecting the file dimension?

Thank you.