1. ZIP. A file compression tool/method
2. MP4. A video format.
Your version of OS X will take care of the ZIP process for you while a program called Handbrake should take care of the other problem.
No guarantee about keeping stuff in the same organized folders though.
Once you unZIp a file, you have two files. The original and the unzipped version
Once you convert a video file, you have two files. The original and the converted file.
I feel that you will be the one to do the organizing
I am looking for a software that unzips and converts MP3+G to MP4, but when they unzip I want them to stay in the same organized folders that they are in. I found some but they put them in all the same folder. Thanks