The last 2 streams have been 720p (poor quality on a 50" 4k display). Could you make sure the preview streams of the routes are 1080p? DTG JD
If you're on a screen smaller than 32" then 720p is fine. It all depends on what the resolution of your display is. On a 1080p display, 720p isn't too much of a loss. On a big 4k (2160p) display, 720p looks poor as it's only about a 1/4 of the pixels and YouTube doesn't upscale