One of the more popular private channels on Roku is Nowhere TV that gives the viewer access to a wealth of content culled from around the Internet. Another popular private channel is Great Chefs that has 700 episodes of the PBS "Great Chefs" cooking shows.
Another popular channel is The Internet Archive that has a huge collection of films and television shows. There are some unusual channels that have gained favor as well, including GoatsLive.com, which is a 24-hour webcam feed of goats. There is also Relax TV, which shows nothing but soothing footage, such as fireplaces, waterfalls and rain.