It was purple/red when I saw it here last week! I live in the middle of Illinois, next to a city.
It wasn’t detailed to the naked eye like the video or like in pictures for me (maybe because of light pollution?), but it was definitely a purple red color.
I know because I was like “what is that color??” I thought of some event or something in the city that direction, but it was weird that it was purple. Then I thought about weed farms, but it would have to be so many weed farms! Then it hit me that it was Aurora borealis.
In photos it’s obviously more striking but I am certain was something other than green!
I had my flash on like a dweeb in my yard, but that made the striations(?) look more interesting so I should remember that for next time.
A friend north of me, also in Illinois but on a farm, got more green toward the horizon as well in photos but to the naked eye he said it looked more like cloud cover.