Converting a document to a video file is not a good idea. Video files are good for movies, documentaries etc.
If you have a LCD/LED TV with a PC input or a computer/laptop with HDMI port, you can connect your computer to TV and use it as a second large desktop. In this way you can either duplicate the computer's desktop on TV or extend the computer's desktop on TV.
This will allow you to view any kind of files like documents, spreadsheets, PDFs, images, movies etc. on the TV for presentation to a group of people. You can even show powerpoint presentations directly on TV.