By watching videos or listening to videos, you make a non-digital copy of it in your mind! Is that legal? If you hum the song, is it illegal reproduction? If yo

By watching videos or listening to videos, you make a non-digital copy of it in your mind! Is that legal? If you hum the song, is it illegal reproduction? If you describe the video to a friend, is that unauthorized reproduction? If you formulate a critique of it, is it an illegal derieved work? Who gets payed in these cases?