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In this video tutorial, the creator demonstrates how to use VBA to encrypt PDF files using a command-line tool created using Python. The process involves downloading an encrypt pdf.exe file and creating a macro in Excel that includes file paths and passwords for multiple PDF files. Before running the macro, it is recommended to backup the PDF files. The tutorial shows how to open the VBA window in Excel, insert a new module, create a macro named encrypt pdfs, declare variables, and reference the worksheet.