software to recude video files size

hi friends am looking for a software that would reduce the size of the video file , im running out of space please help meeeeeeeeeeeeeeeee
Answer #1
convert to rmvb
Answer #2
Try VirtualDubMod.
Answer #3
you recored it your self ? or downloaded it ?
avi ? mpg ? only way to reduce the size is recode it with a loss of quality & it’s time consuming if you want to keep it just burn it to CD’s/DVD’s