请问不支持threads的影片下载吗?

### Checklist

- [ ] This feature I'm requesting is already implemented in yt-dlp.
- [ ] This feature is merely a UI/UX update.
- [ ] This feature is suitable for primary users with little knowledge about yt-dlp.
- [ ] This feature is available for most websites, not only the video platform I use.
- [ ] This feature is suitable for a large variety of videos.
- [ ] This feature is not going to conflict with many of the existing options.

### Is your feature request related to a problem? Please describe.

如题，我自定义了命令，也单独设置了cookies依然无法下载这个平台的影片。
请问是不支持这个平台吗?

### Describe the solution you'd like

_No response_

### Video link

_No response_

### Additional context

_No response_

Obtain a representative Threads video URL and reproduce the failure in Seal with the reported custom command and cookies. Check whether the underlying yt-dlp supports Threads before determining whether Seal needs a change. Done means a representative Threads video downloads successfully in Seal, with authentication behavior confirmed.

Written by the indexing model from the issue text.