In the video, Leila introduces Microsoft's Copilot feature integrated into OneDrive, highlighting its ability to summarize, compare, and answer questions about files. She demonstrates how Copilot can summarize Excel, Word, PowerPoint, and PDF files, providing a quick overview of their contents without opening them. For instance, she uses Copilot to summarize a confidential HR Excel file and BMW's quarterly statement, showcasing how it extracts key information and provides bookmarks for easy navigation. Leila also illustrates how Copilot can create FAQs from documents, such as a PowerPoint presentation on pivot tables and a PDF on using a Nespresso machine, making it easier for users to access information quickly. Additionally, she demonstrates the 'Compare Files' feature, which highlights differences between similar documents, such as gym membership contracts, and compares metrics in different project proposals. Lastly, she explores how Copilot can suggest improvements for documents, like adding visual aids or detailed action plans to a safety report. Leila concludes by mentioning the limitations of Copilot and provides a link for further information, emphasizing the importance of verifying AI-generated content.