Fix usage notes from URLs to lines on stdin

youtube-extract

@@ -8,10 +8,10 @@ import sys
 if any(x in sys.argv for x in ['--help', '-h', '-?', 'help']):
 	print('Usage: youtube-extract [massage|removenonyt]', file = sys.stderr)
 	print(file = sys.stderr)
-	print("In 'massage' mode (default), extracts any references to YouTube videos, channels, and playlists from the URLs on stdin and prints them on stdout.", file = sys.stderr)
+	print("In 'massage' mode (default), extracts any references to YouTube videos, channels, and playlists from the lines on stdin and prints them on stdout.", file = sys.stderr)
 	print('Lines that don\'t seem to contain references to such YouTube things are printed on stderr.', file = sys.stderr)
 	print(file = sys.stderr)
-	print("In 'removenonyt' mode, prints all URLs that look like they are or contain YouTube URLs on stdout.", file = sys.stderr)
+	print("In 'removenonyt' mode, prints all lines that look like they are or contain YouTube URLs on stdout.", file = sys.stderr)
 	sys.exit(1)