Yeah it is reduced automatically, but anyway, back in time when I tried it didn't work somehow, so yes, I always go anyway with 1080. Wow, 4 hours for the upload? That is a lot more than I needed when I was going through mobile data... outside of the European Union 😅
Here in Spain, the time my videos take to upload is...let's say..20 seconds, if not less hehehe. {I didn't pretend to be mean, sorry} but in fact, fiber optic internet makes miracles :D