I'm going to keep it short as a paper on caching content could be a novel (too big to fit here.)
The easy way to help answer my question is to tell me if there's a term of art for the phenomenon that I cite, so that I can read up on this elsewhere on the Internet, and perhaps on CNET! Here goes:
I don't have the Internet on my home computer. However, I have a laptop, and access wi-fi a short walk from where I live. I'm learning a foreign language, and, on my laptop using that wi-fi connection, can download many foreign language news programs from YouTube. However, some clips or programs are available for watching only on a news organization's Web site. That said, I've noticed that in some cases, I can still watch ONE (and only one) video after becoming disconnected from wi-fi - if I've started watching it on my laptop before becoming disconnected (and, I'm not sure about this, if not becoming interfered with by, say, radar waves of a passing automobile). I've also noticed that in some cases, I can watch at least part of that same ONE video additional times so long as I don't try to watch anything else. Since I'm watching a foreign language, this can be very handy. I'm interested in learning more about this type of quirk, and imagine that there must be some explanation about this on the Internet, but can't think of a search term to use. Might you have a suggestion?