Files with mts extension are used for Streaming 3D Viewer plug-in. They allow user to view 3D scenes created in Meta Creations application.
MTS file extension - MetaCreations Streaming 3D Viewer file
What is mts file? How to open mts files?
File type specification:
File extension mts is also associated with Streaming 3D Viewer plug-in for Internet Explorer that allows users to view 3D scenes created in MetaCreations applications and streamed through Internet. It seems to have been discontinued years ago.
Mime types used: application/metastream, model/vnd.mts