Greasy Fork is available in English.
Displays an animated video preview when hovering over its thumbnail on Piped websites
This script adds animated video previews on Piped websites. When you hover over the video thumbnail, the storyboard frames (preview frames that are displayed in the player when you hover over the timeline) will start showing. This way you can "run" through the whole video!
You can configure the speed of changing preview frames and the delay before they are requested to avoid triggers when you quickly move the cursor over the page.