add notes to mpv

1 files changed, 11 insertions, 1 deletions

diff --git a/mpv.md b/mpv.md
index 87171f4b..d7c74e82 100644
--- a/mpv.md
+++ b/mpv.md
@@ -80,6 +80,16 @@ If you would like to specify the font to use, you can include a line like:
 sub-font="Clear Sans Bold"
 ```
 
+# Streaming files from the backstage area
+
+The backstage area uses basic HTTP authentication. To play files
+directly from the backstage area, specify the username and password in
+the URL as follows:
+
+`mpv https://username:password@media.emacsconf.org/path/to/video.webm`
+
+
 # Loading a subtitle file manually
 
-To load a specific subtitle file in MPV, use the `--sub-file=` or `--sub-files=` command-line argument.
+To load a specific subtitle file in MPV, use the `--sub-file=` or `--sub-files=` command-line argument. Note that this argument does not expand `~` to the user's home directory. If you want to refer to something in your home, use a command like: `mpv --sub-file=$HOME/directory/sub.vtt video.webm`.
+