Tagesschau serves its media as MP3, MP4, and that is exactly what you keep. The container is passed through rather than rebuilt, so there is no generation loss between what Tagesschau stored and what ends up in your downloads folder. Tagesschau's extractor is currently flagged as unreliable upstream, so an occasional failure there is expected rather than surprising. Tagesschau is handled by the media route, which reads the site's own rendition list before choosing anything. Tagesschau items commonly run five to twenty minutes, so expect a file of some size.
Shortcut — stick tikt.com/ on the front of the Tagesschau address instead of copying it here:
tikt.com/https://www.example.com/path/to/media
What you actually have to do
1. Copy the Tagesschau 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 Tagesschau 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 Tagesschau 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.