Full policy: https://playoverview.com/privacy/

The extension works only on YouTube, Twitch, Kick, Vimeo, TikTok and Medal. When you open a video there, it sends playoverview.com that video's link, to show its moments on the seek bar and its Analyze button (both can be switched off; then it sends nothing for them). While the sidebar is open, it sends the link of the video in the active tab to show its analysis and, if you're signed in, where you stopped watching, for your History. It reads nothing else from your pages or browser, keeps only its two switches in your browser, and nothing is sold or shared.