ConceptSeek is an AI-powered concept search tool that finds ideas, quotes, and exact moments across YouTube videos, transcripts, podcasts, and long-form documents by meaning rather than exact keywords. Using semantic AI it indexes your curated libraries, returns a grounded synthesis of how a concept appears across selected sources, and links directly to precise timestamps or transcript passages so you can verify context and build evidence-first research. Researchers, students, journalists, and writers use it to trace arguments, gather verifiable quotes, prepare interviews, and avoid relying on broad AI summaries by searching only the sources they choose.