Video "watch it later"

OK - "Watch it later" is wonderful for queuing videos to watch in available free time. But what I want with this is also a link-back to my referring source, so I can comment to the person who originally referred me. Also, while we're at it, I want the videos to load into my available storage so that when I finally get around to watching them, I won't have to wait for the cache to load. I want this loading to be low priority, so that when I am physically downloading something else, this background loading will temporarily halt. All of this could be done, I would think without too much trouble.