VTTLive is a free Chrome extension developed by stt that allows users to easily add subtitles to HTML5 video elements on webpages. It provides a convenient page action icon on the address bar for selected sites, as specified in the extension options.

When the page action icon is clicked, VTTLive performs a search on podnapisi.net for a subtitle that matches the video element on the page or within an iframe. If a matching subtitle is found, it is added as a track element to the video, enabling users to enjoy subtitles for videos that would otherwise have none.

With VTTLive, users can enhance their video watching experience by easily adding subtitles to HTML5 videos. This extension is a useful tool for those who prefer or require subtitles while watching online videos.