Hey there. Have you checked our Help Center article which has more info about custom thumbnails: https://goo.gl/kAAQcF ? Hope this helps.
Hi madam/sir @TeamYouTube my channel custom thumbnails is not eligible but I do why thumbnails is not enable so plz tell about thatpic.twitter.com/HokhNDA2IE
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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