Thanks. So, the Roku is perfectly capable of playing video in a mini window, with the listings to the side. So you could scroll down the listings and highlight another listing while the current one is playing in the mini window.
Is there any reason why no channels use this format. Some of the youtube videos would look a lot better with the mini screen, others would look better with the full screen. At least the option would be nice. The free Hulu uses the same format, with the option for a full screen. I suppose I will continue to use my Panasonic blu ray player for some youtube videos.