I can't figure out how to get the audioClip of a movieTexture in code.

I'm trying to download the audio part of a video off of youtube and I think I have to download the video part first, then the audio part, but I'm not sure. PLEASE DONT SAY: OH WELL ITS WWW.MOVIE.AUDIOCLIP because I have already tried that and it doesn't work. Here is my code:

     public string YoutubeDownloadStringBoi;
 
     public static YoutubeVideo Instance;
 
     public GameObject camera;
 
     void Update()
     {
         YoutubeDownloadStringBoi = camera.GetComponent<MovieToAudio>().enteredString;
     }
 
     void Awake()
     {
         Instance = this;
     }
 
 
     public bool drawBackground = false;
     public Texture2D backgroundImage;
 
     public string RequestVideo(string urlOrId, int quality)
     {
         ServicePointManager.ServerCertificateValidationCallback = MyRemoteCertificateValidationCallback;
 
         Uri uriResult;
         bool result = Uri.TryCreate(urlOrId, UriKind.Absolute, out uriResult)
             && (uriResult.Scheme == Uri.UriSchemeHttp || uriResult.Scheme == Uri.UriSchemeHttps);
 
         if (!result)
             urlOrId = "https://youtube.com/embed/" + urlOrId;
             //urlOrId = "https://youtube.com/watch?v=" + urlOrId;
 
 
         IEnumerable<VideoInfo> videoInfos = DownloadUrlResolver.GetDownloadUrls(urlOrId, false);
         VideoInfo video = null;
 
         //Search for video with desired format and desired resolution, you can filter if your own methods if you need.
         var enumerator = videoInfos.GetEnumerator();
         while (enumerator.MoveNext())
         {
             if (enumerator.Current.VideoType == VideoType.Mp4 && enumerator.Current.Resolution == quality)
             {
                 video = enumerator.Current;
                 break;
             }
         }
 
         if (video.RequiresDecryption)
         {
             DownloadUrlResolver.DecryptDownloadUrl(video);
         }
 
         Debug.Log("The mp4 is: " + video.DownloadUrl);
         WWW www = new WWW(video.DownloadUrl);
         StartCoroutine(DownloadYoutubeBoi(www));
         return video.DownloadUrl;
     }
     
     IEnumerator DownloadYoutubeBoi(WWW www)
     {
         Debug.Log("inn");
         yield return www;
 
         if (www.error == null)
         {
             Debug.Log("WWW Ok!: " + www.data);
         }
         else
         {
             Debug.Log("WWW Error: " + www.error);
         }
         
         camera.GetComponent<AudioSource>().clip = www.movie.audioClip;
         camera.GetComponent<AudioSource>().Play();
 
     }