Summatim

Summatim is a Chrome extension whose whole purpose is to stop you from spending hours on a YouTube video that may not contain what you are looking for. Once installed, it can analyze the content of a video and return a concise summary of its key points, so you can quickly gauge whether the material matches your interests before deciding to watch the whole thing.

The extension is deliberately small and focused. It is not a general-purpose page reader or a note-taking suite; it exists to add a summarization action on top of YouTube. That makes it a natural fit for people who use video as a primary source of information — students working through recorded lectures, professionals following long interviews or conference talks, and anyone who wants to preview a review or tutorial rather than sit through all of it.

Summatim presents itself on the Chrome Web Store as a follow-up to its original YouTube summarization concept, with the extension listed as "Featured" and rated 5.0 by its (currently modest) set of reviewers. Because the value of a summarizer depends heavily on how faithfully the summary represents the source, it is best used as a fast orientation tool: get the gist first, then watch the segments that actually matter to you.