I download some video files from a website which play well using windows media player, the video files plays for 1 hour at most, after converting the files to DVD the files size for each video was about 6.5GB and the original file is far less than 1GB. However, if I order the video on CD'S from the organisation that put the files for free download on their website it takes 2 CDs each which is about 1.4GB.
How can I compress the DVD file to 4.7GB or lesser?