CornerBrief: YouTube Summarizer for Gemini

One click from a YouTube video or thumbnail to an English or Chinese summary in your Gemini account. No API key needed.

Summarize any YouTube video with Gemini in one click, right from the corner of the video. Hover over a YouTube video or thumbnail and a small Summarize button appears in the corner. Click it, and CornerBrief opens a new Gemini tab with the video link and a clear summary request already filled in. You get the main idea and the key points in your own Gemini account, and you can keep asking follow-up questions right there. WHY CORNERBRIEF • One click, no copy and paste: works on the player, home feed, search results and recommendations. • Structured summaries: the main idea in one sentence, key takeaways with their examples and numbers, and a useful next question. • English or Chinese: follows your browser language; switch any time in Options. • You stay in control: send automatically, or review the request before sending. • Careful by design: every summary gets its own Gemini tab, drafts already in Gemini are never overwritten, and refreshing never sends twice. • Nothing to set up: no API key and no sign-up. Just be signed in to Gemini. GOOD FOR Lectures, tutorials, talks, podcasts and long videos you want to size up before watching, or review afterwards. PRIVACY CornerBrief runs only on YouTube and Gemini. When you click, the selected video's link, its title and the summary request go to Google Gemini, and nothing else. There is no developer backend, no analytics and no ads. Preferences stay in your browser. NOTES Requires a Gemini account. Whether Gemini can read a particular video depends on Gemini and on the video. CornerBrief is an independent project and is not affiliated with Google, YouTube or Gemini.