This may be old hat to others, but I just learned it. yt-download works fine on PC but i hadn’t found a way to do so on Android, particularly since most Invidious instances now have download turned off. I did find, however, that if you use an active invidious instance, such as invidious.tiekoetter.com and use the Android App 1DM+ (probably works on the regular 1DM too, but this app is so good I recommend you support the devs regardless by paying for +) you can access a YT video there and it will download fine, in order to be allowed on PlayStore the app blocks the ability to do so when on YouTube, but never thought about doing it this way until today
I meant a desktop, obviously. I use an iPhone and I’m fully aware it runs macOS with a different desktop environment. All Apple devices run macOS, but the interface will be adapted to fit the hardware. It’s all macOS underneath though, which is UNIX.
It’s easier to explain Android, especially to anyone who knows Linux. So Linux isn’t an OS, it’s a kernel. The OS (or distribution, or “distro”) is a collection of software bundled with the kernel that operates a computer. Android is a Linux distro for phones. Plug one into a TV and see what happens (ideally a Samsung). Apple could do this too, have your iPhone or iPad go full macOS if you put it on a big screen, especially if you also connect a keyboard and mouse. It’s just a matter of including that desktop environment… and maybe a couple other things. But Android already does it. And it’s awesome. So yes, they’re computers.