ConceptSeek

ConceptSeek is a concept search tool that lets you search by idea across YouTube videos, podcasts, PDFs, and text documents. Instead of relying on exact keyword matches, it surfaces passages where a concept is discussed, even if the wording differs. The tool is built for researchers, students, analysts, and journalists who need to examine long-form content with precision. You organize sources into libraries—one per topic or project—and search across them simultaneously. ConceptSeek identifies moments in videos or audio where your concept appears, syncing transcript and video at the exact timestamp. The Threads feature maps connections between sources, showing where they converge, diverge, or contradict each other, making it easier to compare evidence. Key capabilities include concept search, Threads relational map, cross-library search, saved searches, and auto-scroll library view. The tool uses a mix of deterministic and AI systems to find, compare, and rank every moment. It deliberately avoids being an AI assistant that summarizes; instead, it returns precise passages for you to interpret. ConceptSeek is ideal for deep research on complex topics, recovering ideas you can't keyword-search, and navigating hours of long-form content without watching or reading everything again. It supports YouTube videos, playlists, channels, podcasts, PDFs, and direct text notes. Pricing starts at $7.5/month billed annually for the Starter plan, with a free 7-day trial on all plans.