[Glant]

Is it based off of a database? Even fairly small YouTube channels seem to work with sponsor block as soon as the videos are uploaded. I always assumed YouTube requires creators to mark which sections are sponsored, and sponsor block has some way of looking that up.

[matheusmoreira]

According to Wikipedia, the data is sourced from users.

https://en.wikipedia.org/wiki/SponsorBlock

> The extension relies on a user-submitted database to identify sponsorships in videos.

> Extension users can submit segments in videos and vote on segments others have submitted.

[dns_snek]

Yeah, it's crowdsourced and user-moderated. It's open source, including all of the data.

https://sponsor.ajay.app/about

https://api.sponsor.ajay.app/database