We've been using "West's Blackhole Script" for a while now, but West is famously known for another very clever Plex/Debrid-based innovation.. the "plex requests" scripts...
If you're using Overseerr to add requests / content to your downloader, it may be too much of a hassle to whip out a laptop, smartphone, or tablet to add content via the Overseer UI. You may be sitting on the couch, with the Plex app open on your big TV, and just want to add content to your library without leaving Plex.
This is what plex-requests does.. it's a clever piece of code which "hijacks" the Plex API, such that when you browse / search Plex's "Discover" interface, it "pretends" that any search results are "found" on your Plex server. They're not actually there, but when the Plex app "launches" the media via your server (the media you don't have), plex-requests intercepts that request, and adds the desired media to your Overseerr setup.
What happens next depends on how your OverSeerr is configured. If you're rocking the Aars, then OverSeerr will add the media to your Aars. If you're using Riven, it'll fire a webhook off to Riven. If you're using SeerrBridge, it'll do the same to SeerrBridge, fulfilling the request directly using DebridMediaManager. Eventually, the media will be in your Plex library, so you'll refresh your search, Plex will show that the media is in your library "for real" this, time, and you can play it. Without ever leaving the Plex app!
It's not instant (depends on your Overseerr and downstream workflow, backlog, etc), but it's a very convenient way to quickly add media to your pipeline using only the native Plex UI / apps. And because it uses Plex's app, plex-requests works anywhere plex works. Plex-requests also supports multiple Plex users, and includes some clever logic to make the importing of "watchlisted" items work better too.
You can add plex-requests to any existing, Plex-based stack! 🎉
Here's a quick GIF-based demo:

And here's an embedded demo video (link here if it doesn't display)