osama-ahmed/youtube-summarizer

This is a Chrome browser extension that generates AI written summaries of YouTube videos. After watching or opening a video, the extension can produce a structured breakdown covering a short overview, key points, things you might learn, notable quotes, a chapter by chapter breakdown, a question and answer section, and an evaluation of the video. The extension does not include its own AI service. Instead, you choose which AI provider to use from a list that includes Gemini, OpenAI, Anthropic, DeepSeek, and xAI's Grok, and you supply your own API key for that provider. This bring your own key approach means your browser talks directly to whichever AI provider you picked, with no server operated by the extension sitting in between. Other features include a keyboard shortcut to open the summary panel quickly, support for YouTube's single page navigation so it keeps working as you move between videos without a full page reload, a history of your last one hundred summaries stored locally on your device that you can revisit or delete, a light and dark theme toggle, and smart caching so reopening the same video shows the existing summary instead of generating a new one. To set it up, you install the project's dependencies and build it, then load the resulting folder into Chrome as an unpacked extension through developer mode, and finally enter your chosen provider's API key. The project states it does not track video URLs, transcripts, or API keys, though it does send anonymous usage events that can be turned off in settings.