Why Threads Media Is Awkward to Save
Threads launched without a save function and has not added one since. There is no bookmark-with-media, no download button in the share sheet, and no export. If you want to keep a video from a post, the app gives you exactly one option: record your screen while it plays, which costs you resolution, adds the interface to the frame, and often desyncs the audio slightly.
Requesting the media file directly sidesteps all of that. A public Threads post serves its attachments to anyone who loads the page, logged in or not — that is what publishing publicly means on any platform. Reading the file URL out of that response and handing it to you is the whole mechanism. Nothing is bypassed and nothing private is touched.
Threads and Instagram Are Not the Same Backend
They share an account system and a parent company, which makes people assume one tool covers both. In practice the two store and serve media through different paths, so a link from one will not resolve on a downloader built for the other. If your URL contains instagram.com, use the Instagram video downloader; if it contains threads.net or threads.com, this is the right page.
What You Cannot Get
Private profiles are closed, same as on Instagram — the privacy check runs on the server and an unauthenticated request simply returns nothing. Deleted posts are gone, since there is no archive here or anywhere else. And text-only posts have no media file to retrieve, though you can copy the text straight from the page. Everything else on a public post should come through cleanly.