Add noplaylist param for avoid download all playlist.

fetchYoutubeSubtitle.py

@@ -40,6 +40,7 @@ async def fetchSubtitle(url: str, lang: Optional[str] = 'en', subType: Optional[
 
 async def fetchSubtitlebyType(url: str, lang: Optional[str] = 'en', subType="vtt") -> dict:
     ydl_opts = {
+        "noplaylist": True,
         "writesubtitles": False,
         "allsubtitles": True,
         "subtitleslangs": [lang] if lang else [],
@@ -107,6 +108,7 @@ def xml_caption_to_srt( xml_captions: str) -> str:
 
 async def fetchSubtitleUrls(url: str) -> json:
     ydl_opts = {
+        "noplaylist": True,
         "writesubtitles": False,
         "allsubtitles": True,
         "skip_download": True,