Update index.js

index.js

@@ -102,7 +102,7 @@ async function ytmp4(url, quality = 'highestvideo') {
   try {
     const ID = ytdl.getVideoID(url),
           data = await ytdl.getInfo('https://www.youtube.com/watch?v=' + ID)
-      const videoStream = await ytdl(ID, { quality: 'highestvideo' });
+      const videoStream = await ytdl(ID, { filter: 'videoandaudio', quality: 'highestvideo' });
       let buffer = await streamToBuffer(videoStream)
       let upload = await uploadBuffer(buffer)
       let format = ytdl.chooseFormat(data.formats, { filter: 'videoandaudio', quality: quality });