Add option to load images remotely while saving pages

[ghost]

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

When saving YouTube playlists like https://www.youtube.com/playlist?list=PLbpi6ZahtOH4OmcA-BD2hn0L082oLvvgV, I often encounter scenarios where many videos (100+) are included. These playlists typically display thumbnail images next to each video's name. These thumbnails are loaded from a standard link based on the video's ID, such as https://i.ytimg.com/vi/9bZkp7q19f0/hqdefault.jpg. Even if a video is unavailable (e.g., private or deleted), the thumbnail link (e.g., https://i.ytimg.com/vi/HELLO-SINGLEFILE/hqdefault.jpg) still functions but returns a generic placeholder image.

Describe the solution you'd like

I suggest adding a new option to SingleFile that allows saving the page with embedded resources (CSS, fonts) to maintain layout and readability, but loads images remotely. This would be beneficial when preserving thumbnails is helpful for reference of videos that are available/unavailable.

Describe alternatives you've considered (optional)

I've considered the existing options in SingleFile (Network > blocked resources), but they don't provide the desired flexibility.

Additional context (optional)

This feature would be valuable for various scenarios beyond YouTube playlists, such as when images aren't crucial to the content and embedding them would unnecessarily bloat the file size.

[gildas-lormeau]

Thank you for the suggestion. If I'm not wrong, it's a duplicate of #1217.