HandBrake is a free, open-source video transcoder for Windows, Linux and Mac OS X. It supports any DVD-like source and most multimedia files and can convert into the following formats:
There are numerous ways one can convert a web page (HTML) to PDF. Some using websites, a Firefox addon, but here is how to do it in Linux by using wkhtmltopdf, a great, flexible cli tool.
Arista Transcoder is an easy to use multimedia transcoder for the GNOME Desktop.