Files with sqz file extension may be usually found as projects from Squeeze professional video encoding software.
SQZ file extension - Squeeze project
What is sqz file? How to open sqz files?
File type specification:
The sqz file extension is mainly associated with the Squeeze video encoding application for Windows and OS X (macOS) and used for one of its default file type.
The sqz file stores video encoding project that stores references to video files, video encoding settings etc.
This sqz file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.