best way of compressing multiple media files?

[SoAndSo]

i need to compress a bunch of frag movies so i can fit them onto a dvd. Im currently just using winrar but i get the feeling the rar file will be approx the same size as all the files i need to compress anyway. i am going to try 7zip if winrar fails. Does anyone have any recommendations?

the original files i want to compress come to 13.2gb, i really want to be able to fit them all onto one dvd

 

[Yakyb]

what format are the videos in?
what resolution?

i would suggest you re-encode them

 

[SoAndSo]

Various formats and resolutions