FluentU is a new way to learn English (and other languages) through authentic video content like music videos, movie trailers, news, and inspiring talks. Watch this video to find out more.
As the name suggests, the limited Free version is free, while the Basic version costs $8 per month, and the unlimited Plus version $18 per month. The system is quite impressive, but for that sort of money I'd expect a wider range of activities (it's mostly vocab building). Besides, there are plenty of other sites which do similar things for free (see below).