Google NotebookLM Adds Video Overviews and Deep Research

Throughout 2025, Google's NotebookLM evolved from a niche document analysis tool into one of the most popular free AI tools. Key updates included Video Overviews (converting documents into visual presentations), Audio Overviews in 80+ languages, Deep Research integration from Gemini, and Data Tables with Google Sheets export.

NotebookLM Plus became available to individual users via Google One AI Premium in February 2025. The tool is especially popular among researchers, students, and journalists.