This is exactly the extension I was looking for. I watch a bunch of youtube channels & videos with "scary" content, but i tend to hate the thumbnails that go along with them (the clickbait-y trend for ~scary~ videos being what it is - "find the most disturbing visual & distort it into something even less pleasant to look at"), which makes it a slog to scroll through some of the channels i actually enjoy! thanks to the developer for making this add-on available, it works well & makes youtube a more accessible site to navigate. 5 stars