How to stream VOD playback?

[Omar-AE]

I'm using ffmpeg to stream videos to a self hosted Node-Media-Server:

ffmpeg -re -safe 0 -f concat -i playback.txt -c:a copy -c:v copy -f flv rtmp://...

and playback.txt contains

file /home/user/test.mp4

and I'm watching through hls (http://.../../...m3u8).
This is live (not VOD).
I want to stream VOD HLS streams through ffmpeg.
Any idea how to do that?