Some arrow traffic lights where the red isn’t visible. Especially when the sun is bouncing off the green arrow making the only lit light the green one...

The video above isn’t an accurate representation of how we interpret the colors.

Me too. I thought I needed more practice with colors.

I have Red-Green colorblindness and watched both the above video and the real one. THEY ARE NOT ALIKE AT ALL.

I agree that there isn’t enough contrast, and that makes things difficult. The video above, though, isn’t accurate. That said, the green uniforms blend in with the field making those players almost invisible.