It's red because it restores your health and missiles a lot lot more than yellow or green parasites. It's funny to see how confused you were. :>
I don't know if it's fully recorded yet, but I'm not going to say anything about the coloured gates. I want to see more confusion.
The first episode and more than one post clearly states it was recorded more than a month ago. Just look at his hair. Besides, you don't really need to say anything about the gates.
I recorded it while I was still in California. It took me forever to edit it because of everything else that was going on.
You should enable the Headphone Sound mode when playing (Visible on the save game selection screen). This will enable stereo sound and a low (High?) pass filter to eliminate the excessive crispness of the audio. Depending on what revision and region of the game you are playing, it may not save the setting so you'll need to set it each time you resume playing (Unless you use save states). So yeah, the biggest impact that enabling Headphone has would be Stereo Sound. The other stuff it changes is more or less subjective and may make you not like how it sounds. Better to try it out early before you get too comfy with the mono sound though!
He recorded the whole thing when he was still in California. That's months ago now. I'll bet he's already finished it. Also you know what we say, DON'T! DOUBLE! POST![/hooverreference]