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Is there a way to check whether it's using RGB model or YUV or another ?

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Computer displays are RGB. Perhaps you need to be more specific? – Ignacio Vazquez-Abrams Aug 26 '10 at 8:34
Are all computer displays RGB? How to prove that? – ApacheNoSkype Aug 26 '10 at 8:35
up vote 1 down vote accepted

Computer displays are using rgb model. As you can see by looking at the signal description of the interfaces VGA or DVI. The CMYK model (subtractive color model) for example is used for Color Printers. It´s because of the base color. The additive model uses black asbase color (as your computer display is in default state). The subtractive model uses white as base color (as the piece of paper you want to print something onto).

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But we can also watch HD video on computer,right? – ApacheNoSkype Aug 26 '10 at 9:11
yeah if your display supports the needed resolution. The color model has nothing to do with the file format. – Diskilla Aug 26 '10 at 9:21

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