(#mb2mkva) Completely off topic: I was hoping to make a redirect rule for Scrolller to Libreddit, but it seems their post IDs are just random.

I did find that the original path on Reddit is in the page inside a stringified JSON object as a global variable defined in a script element. JSON.parse(window.scrolllerConfig).item.redditPath will return the path.

I suppose this could be done with a userscript, but the whole point is to not load the Scrolller page. Interestingly, the first one you posted has been deleted from Reddit.