The custom subscribe button is currently available in landscape view on computers and mobile devices but is not clickable on mobile. You can learn more about it here: https://goo.gl/i6sdrF . Hope this helps clarify.
@TeamYouTube Hey team, I notice some videos have a subscribe clickable overlay popup.
Is this only available for those with a PC computer to access?
Is this only available to select few youtubers?
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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