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Log a YouTube video as watched straight into Chapters. Chapters Quick Log adds a small button next to a YouTube video's Like/Share row. Click it to open your Chapters account, rate the video (1-5), write a review, mark it liked, set the date you watched it, and save, all without leaving YouTube. An optional prompt appears near the end of a video asking if you want to log it, so you never have to remember to come back and do it later. Requires a free Chapters account (sign in or sign up right in the popup). Entries save straight to your existing Chapters library, the same one the mobile app uses, so anything logged here shows up there immediately. Chapters Quick Log never posts or follows on your behalf, it only touches the video you're actively viewing.
rating_count is the Chrome Web Store ratings count, not a written-review count.