

You can test your project on several different players and screens, but there's no guarantee it will always look and sound the same way it did in a controlled environment. There is no way to make them all sound the same. One can make a good argument that the same problem exists for sound: the identical mix will sound different on earbuds, laptop speakers, TV speakers, and theater speakers. These articles explain why in more detail: And I wouldn't trust what I see in the GUI. The same image will look different on a laptop, a cellphone, a tablet, or a desktop computer.


The only way to ensure accurate playback is to have a color managed system and a calibrated display. Color can change across different platforms or different OS's, and can also change depending on browser or playback engines.
