Graduated Compression PLEASE!! Do You Know Of A Free Video Compressor / Converter That Shows & Allows Change In Output File Size?

PLEASE!! Do you know of a free video compressor / converter that shows & allows change in output file size? - graduated compression

I post videos very important to a website and compress files to show less than 100 MB and I need a free (for graduates and can not afford breakfast, let alone pay for this service) the size of the compressor output files before compression . I have both, and trial versions of Ashampoo MediaCell total control to enable the use of trial versions, but once the process is completed and the service. Further tests of compressors to compress only a portion of the video. Please help me ... I share many hits on my site and love what I show to have the public and it really helps people, so that every proposal is welcome.