So I normally leave landscape mode off for various reasons. However, I watch youtube videos sometime with the native Youtube app. When watching videos in portrait, I can't seem to find an option to manually make it "full screen", ie change to landscape. I don't want to turn on screen rotation just to be able to watch youtube videos. Is there any way around this? OR have I just missed an obvious option somewhere? If not, I think it's really dumb that there isn't some button I can click to manually make it landscape.