In Harmony when I go into the render view my lines look really blurry and when I upload it to youtube.
You’re showing a 320 percent zoom of the rendered image. How does it look at 100 percent is what matters on render view, since it produces a bitmap and scaling it will result in pixilation and blurring. If it looks blurry on YouTube make sure you’re exporting it at least HD and that the YouTube player is reproducing it also HD, not on a lower resolution due to bad internet connection or any other issue. Sometimes you might need to force the resolution manually (by clicking the settings icon on the bottom right of the window) because Auto can make it play at 360p or something. It should look more or less the same on the file you export from Harmony or the editing software and on YouTube.