[options] Mention comments support in --batch-file

diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 7d1bbc02102ec860ab417301f478309fe0c379e0..3e4ac03a240844ef3b69fd21dbedcc441a46e5c7 100644 (file)
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -676,7 +676,8 @@ def parseOpts(overrideArguments=None):
     filesystem.add_option(
         '-a', '--batch-file',
         dest='batchfile', metavar='FILE',
-        help='File containing URLs to download (\'-\' for stdin)')
+        help="File containing URLs to download ('-' for stdin), one URL per line. "
+             "Lines starting with '#', ';' or ']' are considered as comments and ignored.")
     filesystem.add_option(
         '--id', default=False,
         action='store_true', dest='useid', help='Use only video ID in file name')