Algolia's TalkSearch is a tool that enables in-video search on websites. It uses video captions, transcripts, and scripts with time signatures to index the content of videos. The tool allows users to search for specific words or phrases within the videos, providing instant results as they type. Additionally, it highlights matching terms in the search results, making it easier for users to find relevant content. The tool also prioritizes attributes when ordering search results, ensuring that titles and descriptions are searched first, followed by captions and other attributes. By providing this functionality, websites can encourage users to stay on their site and engage with more content, leading to increased user engagement and retention.