Complex sentence: It is an extension of Redford's non-profit Sundance Institute, a center in which independent filmmakers can harbor and extend their craft though the channel operates independently of both the Sundance Institute and the Sundance Film Festival.
Split into simpler sentences: It is an extension of Redford's non-profit Sundance Institute, a center in which independent filmmakers can harbor and extend their craft though the channel. The channel operates independently of both the Sundance Institute and the Sundance Film Festival.