Greasy Fork is available in English.
Hover a thumbnail at its bottom part and move the mouse horizontally to view the actual screenshots from the video
< Valutazione su YT: peek-a-pic
That was due to my recent mistake which is fixed in the new version, thanks for reporting.
Really great extension
only complaint i have is how the entire thumbnail darkens on hover, when it should really only do that when the "pics are being peeked" not really a big deal tho since i was easily able to edit it to disable the darkening