NoteAi is an AI-powered knowledge base tool that transcribes and summarizes YouTube videos, podcasts, lectures, and recordings into structured notes, mind maps, and visual study guides. It automatically captures key frames and slides from video content to create illustrated notes, and syncs each node in a mind map to the exact moment in the source video. Users can chat with their content to ask questions, request summaries, or generate quizzes without rewatching. NoteAi supports 22 or more languages with dual-view translation, and offers customizable note templates such as Cornell Notes and Meeting Minutes. A free plan is available, with paid tiers offering more credits, faster processing, and advanced features.