Thisvidplaylist carries age-restricted material and the extractor sees those items flagged as such. That does not change how the download works, but it is worth knowing what you are saving before you save it. Thisvidplaylist is handled by the media route, which reads the site's own rendition list before choosing anything. Some Thisvidplaylist URLs name a collection rather than a single item, and those return everything the collection holds. The renditions we see from Thisvidplaylist arrive as MP4.
Shortcut — stick tikt.com/ on the front of the Thisvidplaylist address instead of copying it here:
tikt.com/https://www.example.com/path/to/media
From the Thisvidplaylist link to a saved file
1. Copy the Thisvidplaylist 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 Thisvidplaylist 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 Thisvidplaylist 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.