In the Roku Channel there used to be a category of "Live TV" amongst the others (comedies, crime, etc) and that's how I've discovered some streams to watch, such as BUZZR, Pet Collective, Fail Army.
Now they are all lumped into the "Live TV" icon in the "Featured" section at the top (I have roku 2 and express devices) and I have to wait for it to load, arrow left to get to the channel list, press * to sort by recently watched, then select the channel I want to watch...ugh, please reinstate the subcategory of Live TV to the list of genres.