When I press F3 key in Midnight Commander on a .ts file, I get the message:
Please install either mplayer or mpv to get information for this file
How to configure Midnight Commander to view a .ts file as text?
Linux Mint 20.1, Midnight Commander 3:4.8.24-2ubuntu1
Most often .ts extension is used for MPEG video so MC is preconfigured to play it with a video player.
To configure extension mapping press F9, choose "Command" menu and in it "Edit extension file" submenu. See my mc.ext. You need something like
shell/.ts
Open=less %f
View=%view{ascii} cat %f