You can definitely watch multiple streams at once on a desktop with YouTube TV's multi-view feature, it's pretty cool. To enable it, you just need to be on a computer, not a mobile device or TV, and have a decent internet connection. Once you're on the YouTube TV website, you can right-click and select the multi-view option, or sometimes it's available in the settings menu. You can watch up to four streams simultaneously, which is great for sports or news. However, keep in mind that not all streams are available in multi-view, and the quality might not be as high as watching a single stream.