Not a streaming channel itself, but one of the best sites to check out is: http://topdocumentaryfilms.com/

I don't watch any sports so I can't speak much about that. What I can say is that I found that I watch more television since getting rid of cable. The shift is that you start to watch what you want, rather than browsing 500 channels of nothing. There is a huge amount of streaming and online content available and…