Hi Patricio. This is how I do it. I bring up YouTube on my IPhone and connect from the head phone jack to a line in on a digital recorder. (I have a Boss BR800). I record the YouTube video into the BR , then I import it to my my computer, then import into my DAW. It's probably not the easiest way, but it works. Good luck.
_________________________
www.soundcloud.com/tckramer