Make subtitles and thumbnails downloadable without requiring to download video/audio

[Playerend]

Checklist

• [ ] This feature I'm requesting is already implemented in yt-dlp.
• [X] 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.

No response

Describe the solution you'd like

Allow users to download subtitles and thumbnails without requiring them to download a video/audio file or the video/audio file that Seal suggests

Video link

No response

Additional context

No response