MT2S files are High Definition Sony Blue ray AVCHD Files,
commonly produced by High Definition Camcorders.
To use edit and play these files on your Linux system
Openshot video editor works well as a video editor
yum install openshot or apt-get install openshot
although VLC can play these files you need to make the following changes to VLC so that they play well.
open up VLC
Go to Tools -->Preferences --> Input & Codecs
on the option “Skip the loop filter for H.264 decoding” select ALL
Then in preference window Click Show Settings -> All. and expand Stream Output ->
Click Muxers ->select Mux module as “FFmpeg muxer”
Expand Video -> Select Output module -> In Video Output module and select X11 video output.
and then save your settings
MT2S high definition files should play much more smoothly in VLC now.