We print posters at home with PosteRazor
Posterazor is a software open source (also available in Italian) for printing in series of most parts of the same photo.
In short PosteRazor takes a’raster image (because the work is to be well very large), the divided into multiple images A4 that will go to format a PDF. Once you have created PDF will be simple print, trim the edges unnecessary and glue the edges Useful.
But if it is true that a picture is worth a thousand words, let alone a video.