Great feedback. I like 1, to have an overlay popup window for explanation. Basically, channel contains segments, segment contains clips. Segments are groups

Great feedback. I like 1, to have an overlay popup window for explanation. Basically, channel contains segments, segment contains clips. Segments are groups of clips, for grouping time-related clips or topic-related clips. Youtube videos are often broken into multiple clips (show1 to showN). You are right. It's kind of difficult to explain the hierarchical organization in one shot. Viewers just want to watch TV; don't care about organization. The 2x5 control grid is supposed to mimic TV remote, to place on right hand side vertically instead of horizontally to avoid obscuring the vertical screen space. There's a scrollbar at bottom for finer playback control.