On mobile, many videos will start at 720 and I have to specifically select a higher resolution but it will stay there. It will have me wait for buffering if my internet isn’t capable but it won’t drop the resolution.
On pc it remembers the resolution you set last.
Image where the bush fence appears, there should be a faint path near the road, those who don’t want to hop over/wreck the bush but it should be gone once the path through the bush is open.