advanced usage requirement

README.md

@@ -59,7 +59,9 @@ To run this yourself, get this source code. As the project currently exists you
 * If you're on macOS `stream.sh` might need to be changed a bit and you might not have the fonts in `config.json`.
 * If you're on Linux `stream.sh` will probably be alright but you might not have all the fonts in `config.json`.
 
-Assuming you've dealt with that, this is what you have to do.
+As an aside: you can change the command in stream.sh to record anything you want, it doesn't have to be just your screen and system audio. If you want to change stuff around, just know that all that's required is: (1) `stream/pid.txt` contains `stream.sh`'s process ID, (2) `stream/start.txt` contains the time the stream started, (3) HLS segments appear as `stream/stream*.m4s`, and (4) `stream/stream.m3u8` is the HLS playlist.
+
+Assuming your FFmpeg command is working, this is what you have to do.
 
 ### Start streaming