Yeah I made some more tests with a full RGB color image and a youtube uploading and everything is fine now. I'm pretty sure there was trouble some time ago tho

Yeah I made some more tests with a full RGB color image and a youtube uploading and everything is fine now. I'm pretty sure there was trouble some time ago though.... (It was with another computer. There's a lot of things that can introduce color shifts : video platform encoding, browser decoding, graphic card drivers / configuration etc.) Thanks for the comment