I certainly believe the Uber dashcam video was poor quality. But at the same time, the videos on the link you showed are a bit misleading because the holiday lights are not strung up all year, and in any case the collision happened after the bridge, where to the right of Mill Avenue is a big golf course which is going to be dark at night, and to the left are some desolate office buildings that would also be empty and dark. It's just not a well lit area, neither is it an area with a lot of pedestrians, so there aren't many crosswalks.
Ahh, OK, so those Christmas lights are gone by then. Yes, if you look, you see a park/golf course on your right and some office buildings on your left. I guess how well lit it is will depend on how many lights are on in the office buildings, plus of course the street lights. But if you poke around the area, you see that the street lights are insufficiently spaced, at least that's my impression. That area north of the river is not a pedestrian area, even along Mill.
The victim was struct pretty much directly under a streetlight, not at the halfway point between two streetlights. And the lights in office buildings are pretty much irrelevant, streetlights way overlight them.
You can explore for yourself here:
https://www.google.com/maps/@33.4380916,-111.9434265,3a,75y,...