A computer-implemented method is described for automatically digitally transforming and editing video files to produce a finished video presentation. The method includes the steps of storing video files with associated tags, recording or receiving from a user a master video, matching the words or phrases recorded in the master video with the tags to determine one or more locations at which to insert the video files, and automatically assembling the master video and video files into the finished video presentation. Audio and visual effects may also be added to the video presentation. Computer apparatus configured to generate the video presentation is also described.