I know that YT apparently has 3 possible thumbnails for a vid, the first last and middle frames, and I assume that with YT vids, *findthumb should switch which of these 3 VS is using as its thumb for the vid. I've no idea how other hosts handle thumbnails.

I've seen many a findthumb invocation made in a dispirited way where the invoker has no faith that it will succeed, and have never spotted one that sifty reported as a success. Has he ever succeeded? Did it used to work, but stopped working a while back? Does it work for some hosts still but not others?

Just wondering if sifties thumb finding success rate is actually above zero tbh.