ERROR: unable to open for writing: [Errno 13] Permission denied

[mrracoonman]

I'm trying to get my bot to use youtube_dl to download and play a youtube link. Here's what I have:
(I promise everything is properly indented, it just looks strange on here)

@bot.command(pass_context=True, aliases=['p'])
async def play(ctx, url: str):
song_there = os.path.isfile('song.mp3')
try:
if song_there:
os.remove('song.mp3')
print('Removed old song file.')
except PermissionError:
print('Trying to delete song file, but is being played.')
await ctx.send(f'ERROR, Music playing')
return

await ctx.send(f'Getting everything ready now')

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        "preferredcodec": 'mp3',

    }],
    'outtmpl': 'C:/Users/User/Downloads/mp3 files/ytdldownloads'
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download([url])
    print(f'Downloading audio now')

for file in os.listdir('./'):
    if file.endswith('.mp3'):
        name = file
        print(f'Renamed file: {file}')
        os.rename(file, 'song.mp3')

guild = ctx.guild
voice_client: discord.VoiceClient = discord.utils.get(bot.voice_clients, guild=guild)
audio_source = discord.FFmpegPCMAudio('C:/Users/User/Downloads/mp3 files/ytdldownloads/song.mp3')
if not voice_client.is_playing():
    voice_client.play(audio_source, after=lambda e: print(f'{name} has finished playing'))

---

It works up until about ydl.download([url]) in which it sends the error:
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: DownloadError: ERROR: unable to open for writing: [Errno 13] Permission denied: 'C:\\Users\\User\\Downloads\\mp3 files\\ytdldownloads'

I've tried changing the location it downloads it to, you can see that in the error itself, but it still says it need permission. Does anyone know how to get past that or grant said permission if needed?

Win10, py 3.8.6