Install the extension to automatically skip sponsor reads on every YouTube video you watch without touching the slider.
Submit sponsor segment timestamps to grow the community database so other users benefit from your contributions.
Use the public SponsorBlock API and open dataset to build a third-party port for a media player like MPV or Kodi.
Download the open database to train a machine learning model that detects sponsor segments automatically.
SponsorBlock is a free, open source browser extension that automatically skips the sponsor read sections inside YouTube videos. These are the moments where a creator pauses to promote a product. Once you install the extension, those segments are jumped over for you, so you do not have to grab the slider and fast forward yourself. What makes it work is crowdsourcing, meaning the data comes from the users themselves rather than from one company. When someone watches a video and reaches a sponsor segment, they can mark where it starts and ends and submit that to a shared database. From then on, everyone else's copy of the extension knows to skip that part of that video automatically. The more people who contribute, the more videos are covered. Beyond sponsors, it can also skip other categories you might not want, such as intros, outros, and reminders to like and subscribe. The extension is available for a wide range of browsers and devices: Chrome and other Chromium browsers, Firefox, Edge, and Safari on Mac and iOS, plus an Android version. It also works with Invidious, an alternative front end for watching YouTube. There are third party ports that bring the same skipping behavior to media players like MPV, Kodi, and Chromecast. A notable point in the README is the author's commitment to keeping the project alive. The collected database of sponsor timestamps is made publicly downloadable, so the data is not locked away even if the project were to stop. That open dataset and its API are already reused by the various ports and even by a separate neural network experiment that tries to detect sponsors automatically. The backend server that stores all the submissions is kept in its own separate repository. The README also credits the tools and people behind the project, including the services it uses to fetch video information and the designers of its icons. The extension can be translated into other languages through a community translation platform, and the whole project is released under the GNU GPL version 3 license.
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