diff --git a/youtube_dl/extractor/tvplay.py b/youtube_dl/extractor/tvplay.py
index 6e4556746..bcfce2379 100644
--- a/youtube_dl/extractor/tvplay.py
+++ b/youtube_dl/extractor/tvplay.py
@@ -310,6 +310,7 @@ class TVPlayIE(InfoExtractor):
 
         self._sort_formats(formats)
 
+        # TODO: webvtt in m3u8
         subtitles = {}
         sami_path = video.get('sami_path')
         if sami_path: