That’s interesting, as I’ve always heard that the red phosphor decays at a much slower rate, and that appears to be corroborated in published rates of decay: the decay rate (to 10% luminance) of the standard blue phosphor (known as P22B) is ~25 microseconds vs green (P22G) at ~60 microseconds and they’re both much, much faster than red (P22R) at a whopping ~850(!) microseconds. (scroll down to table 6-2 for details)
Now, I believe that’s just for the amount of time that it’s luminescing (as these numbers are far too small be visible across multiple frames, even for red), and the real issue is phosphorescence (aka “emission time” or afterglow), and that apparently has more to do with the activator material that the phosphor material is doped with, but in this case, too, the one used in red phosphors (Europium) has a “very long” afterglow vs “short” for silver and “long” for copper used in blue and green phosphors, respectively.
I think this video supports that, with the blue of the sky fading to nothing after just 1 or 2 scanlines, while the green trees hang around a lot longer and the reddish Mario and ground pixels hang out even longer than that.
To be fair, though, red and green are fading out much faster than a full frame in that video, too, so there may be some other effect at play–maybe having to do with responsiveness of rods/cones in the human eye and/or photoreceptors in cameras–but if so, that does lead me to wonder if videos can be reliable. Dunno