Does the YouTube app really download the video again each time you play it? I have noticed that downloaded videos always play in full quality. (In fact, that's the main reason I use downloads: play a short, stop it, go to history, download the short, then play it again. Because shorts have no quality control option, and also no download option except from the watch history. Shorts have a very weird and annoying UI. It's also impossible to add them to a playlist.)