I presume you have copied the video files to your harddrive on pc.
You haven't said what format the files are in and what you want to convert them to.
If you are wanting to make them into TS Video (as a DVD) you can use the free program dvdflick this page tells you what files you can import to it and it will convert them http://www.dvdflick.net/features.php remember to download the .pdf manual as well.
Or you could use the excellent Free program FormatFactory from http://www.pcfreetime.com/
As with all free programs when you install them watch out to make sure you untick any extra toolbars and programs they offer.
As a note: it is always a good idea to make a copy of your original file and then work with the copy.