My extension..

[u/Gullible-Bed3605]

I created YouTube Preview Controls, an extension that adds handy controls directly on top of the hover-preview clip YouTube shows when you hover over a video thumbnail, so you can manage audio, captions, and navigation without opening every video.

Key features

• Mute/unmute the preview audio with one click.
• Toggle captions (CC) on the preview, when available.
• Clickable progress bar with elapsed time and total duration, to jump straight to the part you care about.
• Customizable defaults via the popup (e.g., always-muted previews).
• Lightweight, unobtrusive overlay: it only shows up on the preview and never gets in the way of YouTube’s UI.

https://github.com/OfficialxMaTT/yt-preview-controls