"Unlimited" means your time on the internet is not restricted. If you have, say, 100 minutes, then you can be connected to the internet for 100 minutes. Bandwidth is the issue. If a lot of people are using the internet, then watching videos will be slow to nonexistent even if you have unlimited internet. And if you have 100 minutes, it gets used up fast because the internet is so slow (you'll be waiting a long time for the video or website to load). If not many people are using the internet, like late at night or early in the morning, then you should be able to watch videos. Same is true for going to any website (or clicking on a link, etc).