Compress qt

Download and install the latest version of Filestar.
Right click on one or more Qt file(s) on your desktop and select Convert with Filestar.
Type compress in the search box.
Press Compress.

What is .qt?

Name: Apple QuickTime Movie
Extension: .qt
Format: Video
Category: Video
Developer: Apple
Description: Apple QuickTime Movie (.qt) is a multimedia file format developed by Apple that is used to store audio and video data. It is supported by both Windows and Mac operating systems and can be played with the QuickTime Player. It is often used for streaming media over the Internet.
MIME Type: video/quicktime
Wikipedia: .qt on Wikipedia