1 files changed, 3 insertions, 1 deletions

diff --git a/README.md b/README.md
index 7dba5775d..5af0f387b 100644
--- a/README.md
+++ b/README.md
@@ -223,7 +223,9 @@ Alternatively, refer to the [developer instructions](#developer-instructions) fo
 
 ## Filesystem Options:
     -a, --batch-file FILE            File containing URLs to download ('-' for
-                                     stdin)
+                                     stdin), one URL per line. Lines starting
+                                     with '#', ';' or ']' are considered as
+                                     comments and ignored.
     --id                             Use only video ID in file name
     -o, --output TEMPLATE            Output filename template, see the "OUTPUT
                                      TEMPLATE" for all the info