feat: YouTube:Add Slide to Seek thumbnails quality

[hphp22f]

Application

YouTube Music

Feature description

The seek thumbnails quality looks very poor when the video is dragged to view. There are many problems to understand if an article is a video. So adding this feature is very beneficial. The quality of previous small slide To seek was good.

Motivation

N/A

Acknowledgements

• This is not a feature request for YouTube.
• This issue is not a duplicate of an existing feature request.
• I have chosen an appropriate title.
• All requested information has been provided properly.
• I have written the title and contents in English.

[ghost]

Restore old seekbar thumbnails setting is deprecated in YouTube 19.17.41+ (Google removed the code).

If you want it, you need to apply the patch to YouTube 19.16.39.

There was Enable High Quality Thumbnail patch but it was not working, so it was removed.

#2460

Maybe inotia00 will add it back in the future.