That's true, but Inno is making a point that's worth noting. If what you save is the address rather than the actual video, as your method and my method does, than you don't have the video once there's no address leading to it anymore. It won't do you any good to have the name of the video or its address to search YouTube for it if it isn't on YouTube any more. But if you have some way of saving the video itself, then it doesn't matter if it's removed from YouTube.
This point was driven home to me yesterday after my previous response to this topic. I went to the folder containing YouTube videos in my Favorites and clicked on one to see what I could tell about it. What I could tell was that it had been removed from YouTube and all that happened when I clicked on it was that I got an error message. I thought that was pretty strong confirmation of Inno's point.