Hi James! The thumbnail window is available when fast-forwarding (or rewinding) when a video is fully rendered. This generally takes up to 72 hours from the time the video is available in your library. Hope this helps clarify!
@TeamYouTube @YouTubeTV Sometimes during fast forward on YouTube TV the little window appears showing progress of show. Other times, it doesn’t and only shows time. Super helpful when window is present. Any rhyme or reason to when it’s available??
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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