For this roll the extra two won't matter. You can see that they are heading into the woods. After a few minutes they disappear into a nearby rock.
In regards to an urban ranger, I think it could be plausible with the urchin background which allows them to more quickly move through the city. Also depending on the setting in sure a DM would allow it.
Yeah, I feel like asking to make a ranger whose favored 'terrain' is the city isn't too big of an ask from most DMs, but really at the end of the day it's a case-by-case basis I guess. It seems like that kind of stuff's sort of out of the 'scope' of what the image of a ranger might be to some people, which is totally fair. I'm probably just the weird one - I do kind of like to stretch the flavor of a class outside of its normal sort of 'archetype' sometimes, for a lack of a better word. For example, one character I kicked around in theorycrafting was a Way of the Astral Self Monk who instead of creating astral limbs had his body undergo controlled metamorphosis that granted him the same benefits. Is he still really a monk of the Way of the Astral Self at that point? Probably not in terms of flavor, but mechanically he still follows all of the rules of the subclass.
Of course, that doesn't mean that he's necessarily appropriate for just any old campaign, just like how not every DM might want to allow players to make an urban-style ranger. That's why I personally always think it's important to ask permission from the DM before doing anything that steps out of RAW or trying out something unusual, like a ranger who prefers the dark alleys of the city to the green canopies and untamed wilderness of the forest. Just because I might be okay with somebody joining a group I was DMing with an urban ranger doesn't immediately mean that everyone else is going to be, you know?
Anyways, late night stream of consciousness rambling aside, I figured I'd go ahead and mention before I hop off tonight that I probably won't be active much tomorrow, or if I am it'll be much later in the day.