This is a Google Chrome Extension that aims to aid students in studying. it allows students to bookmark specific timestamps in videos that can easily come back to. This solves the well known issue of having to scroll through a video to find the point you wanted to refer back to or forgetting what video you saw previously by bookmarking them in a convenient location.
The extension currently has 100+ users in 20+ countries
The privacy policy for YTSave that discusses how the extension collects data, why it needs the data, and how the data is used can be found Here