[mmcclure]

It's an image from one of the examples showing the situation. Specifically, this is how Firefox renders the different videos.

> There is a lot to unpack here. Since 709.mp4 and 709vui.mp4 look the same, we can deduce Firefox assumes BT.709 when the VUI is not present. 601vui.mp4 rendering correctly means the VUI is honored for BT.601 content. However, when a BT.601 file without a VUI is rendered as 709 it becomes very dark. Obviously, it's impossible to render things correctly without the necessary information, but the choice Firefox made distorts the color more drastically than the method Safari and Chrome use.

[billytetrud]

Its labeled with a different color value tho (0, 77, 0). Is it just saying that's the value it is rendering as, but implying that it was encoded as the same green color?

[mmcclure]

Ah got it, those are the value it's rendering as, all of them were encoded with the exact same green.

[billytetrud]

Ah gotcha. I expected that's what it had to have meant, but it wasn't clear just from looking at the image.