With TurboWarp a couple years back, it was possible to view unshared projects. Then, Scratch updated it's API and now you cannot do what was possible two years ago. However, I just discovered that although you can't VIEW the project, you can see the THUMBNAIL. So type in an ID and see what happens!
Remix this project with a collection of cool IDs and their thumbnails or vice versa- I'd like too see it :) Also a glitch: if you enter in an ID (usually below 10,000) then go back here and add a 0 before the ID and it will work.