There is only one file type that uses the .LIBZIP extension:
Camtasia Studio Zipped Library File
A LIBZIP file is a zipped library used by Camtasia Studio, a screen recording and video editing program. It contains media assets such as intro titles and themes.
A LIBZIP file is used to export and import library assets, such as title clips, callouts, and transitions. This allows team members to use the same assets for a similar look and feel in their projects.
Updated: April 30, 2018