wayne@audi:$ tar vxzf Image-ExifTool-11.11.tar.gz
wayne@audi:$ cd Image-ExifTool-11.11/
wayne@audi:Image-ExifTool-11.11$ perl Makefile.PL
wayne@audi:Image-ExifTool-11.11$ make test
wayne@audi:Image-ExifTool-11.11$ sudo make install
wayne@audi:Image-ExifTool-11.11$ exiftool -ver
11.11

Removing metadata, (while preserving modifydate)

exiftool -overwrite_original -all= -tagsFromFile @ -filemodifydate  VideoFile.m4v

Sources:

exiftool Home
exiftool History
Installation Instructions
StackExchange: exiftool: delete exif data but preserve some specific tags
Application Documentation
HOW TO: Remove EXIF Metadata