It's a .ts file. If you have VLC media player, that will open it.
No, I don't have VLC. I use Bandicam. Bandicam doesn't do playback. It shoots video and single shots, i.e. photos. I use Realplayer for playback or whatever is pre-installed on this computer. Since it's a new to me, computer, I haven't checked out what it is because I have my preferences for playback and just didn't bother to see what is on here that opens when I don't deliberately tell the computer to open something with XYZ.
Maybe I'll get VLC, again. I just didn't care for it but I know a lot of people use it.