Walmart is running a Roku Express for $22 on Black Friday. It says on the specs it will run 720p and 1080p. It also says it upscales 720 to 1080. What will this do on the 480p stream? Will it work? Cause buffering? Anyone know if it can be adjusted to 480? Will it upscale the 480 to 720? I’ll be upgrading to a Roku 4K tv (dvds, gaming and such), but want one of these for my second tv.