Adding STRMs to Kodi

Can someone help me with STRMs,
I have worked out (Finally) how to make a STRM file.
I can play it through the file section in Kodi, and It works, But how do you add it as media to Kodi.
Do you add it as A Movie or a TV show? I can’t for the life of me figure that bit out. I seem to make everyone angry when I ask about this, but I just can’t get it.
All I want to do Is get a STRM into a Kodi Smart Playlist.
Is that Possible or am I still in the Wrong Lane Again?
Thanks
Oz