Ok that’s fun I was unaware of this term. It’s kind of interesting though to apply the term to something like digital streaming media that’s already, for lack of a better term, pre time-shifted.

Time shifting?

Going to YouTube and having your browser download the video so you can watch it would be an approved way to download the video, making further copies of it more than likely not.

I mean technically speaking unless you have permission of the copyright owner to download their video any tool you use to download (almost) any YouTube video would be a piracy tool.