void EnumSources()
    {
        PopMovie.EnumDirectory(Application.streamingAssetsPath, true);
        PopMovie.EnumDirectory(Application.persistentDataPath, true);
        PopMovie.EnumDirectory(PopMovie.FilenamePrefix_Sdcard, true);

        var Source = PopMovie.EnumSource(mIndex);

        if (Source == null)
        {
            return;
        }
        AddSource(Source, mIndex);

        mIndex++;
    }