Notes about the GMM file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The GMM file type is primarily associated with 'GMT Player' by GGMMTV Ltd.. Video using proprietary compression technology: HVMT (High-quality Video Media Technology). GMM is another extension associated with the GMT Player; .GMM (Global Mobile Media) and/or .GMT (Global Mobile Television) can both be played by the GMT Player available for operating systems running under Windows XP, Windows Vista, Windows Mobile 5 and 6, and Symbian S60 v.3. HVMT is designed for IPTV use for PCs as well as mobile phones.
Detailed information for file extension GMM:
File classification: Video
Other applications associated with file type GMM:
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.