Thisamericanlife serves its media as M4A, and that is exactly what you keep. The container is passed through rather than rebuilt, so there is no generation loss between what Thisamericanlife stored and what ends up in your downloads folder. Thisamericanlife is handled by the media route, which reads the site's own rendition list before choosing anything. No credentials are involved anywhere in this path — neither yours nor ours.
Two ways in: the box above, or prefix the Thisamericanlife URL you are already looking at with tikt.com/:
tikt.com/https://www.example.com/path/to/media
From the Thisamericanlife link to a saved file
1. Copy the Thisamericanlife link
Use the address bar or the platform's own share button — both give a URL the extractor recognises. Point it at the single item you want, not the page around it.
2. Let it read the renditions
Paste the URL above. The extractor asks Thisamericanlife which renditions exist for that item and picks the best progressive one rather than assuming a quality.
3. Save what comes back
The file arrives in the container Thisamericanlife served it in, and the extractor does not rebuild it — so what you end up with is what the uploader encoded, for better or worse.