If you have a large number of video files and image files then a program like XnView could be a lifesaver for you. This simple and easy to use program makes it a breeze to copy and convert a huge number of file formats, working with all of the popular image and video file extensions such as MPG, MPEG, TIFF, GIF, JPG, BMP, MP4 and many more. XnView supports hundreds of file formats meaning that you will never be found wanting.
The interface of XnView is very similar to the Windows Explorer interface, making it second nature to anyone who has ever used the Windows Operating System. It has an in-built previewer which allows uses to see how the conversion will turn out before the user has committed to the conversion. XnView can be used by anyone, regardless of their technical expertise. It is quick, efficient and comes complete with a multitude of features and capabilities. If for some reason you do get stuck using XnView, there is a comprehensive help folder to help you get back on track.