My youtube video look too bright!, Hardware Acceleration, Video Codec

[pack_itti]

Youtube : https://www.youtube.com/watch?v=xBywdus22f8

When i use 'Google Chrome' and 'turn on'Hardware Acceleration on setting system

when i upload my video on Youtube it look very bright than the original ('Black Color' turn to -> Gray)

but when i watch another video on youtube on Black area ('Black color is still black') why? It doesn't look very bright like my video

I render my video on After effect Cs6 use format that h.264 (Too Bright) / quicktime (seem okay but still bright) /

// if i 'turn off' hardware Acceleration.

My video look great (Black is Black) and it's okay

** How can i fix this, i want to know

How can i render / setting project / or I missing to setting something / what's a codec (you/they) use for render the video to make a video doesn't look too bright when it 'turn on'Hardware Acceleration

Thanks

(I use Pc/Win8.1 Chrome)

[Mylenium · Accepted solution]

You have to read up on color managment, how it works on your computer and how CoDecs behave in terms of Gamma and so on plus how YouTube treats your videos. This has absolutely nothing to do with AE exceptz for perhaps having to apply a manual Gamma control effect at some point.

Mylenium