User blog comment:EthanConquistador/Cleanup the Wiki and Custom Thumbnails/@comment-6812733-20131212122941

You need a good reputitation in YouTube to be able to use custom thumbnails. Atleast that's what I was reading from YouTubes own page about custom thumbnails. So I guess with everyone else having copyright infringements in every video, we won't be able to create any custom thumbnails.