Input: Pass --no-playlist for YoutubeDl (#168)

If a link such as [this](https://www.youtube.com/watch?v=ygY2qObZv24&list=RDygY2qObZv24)
is passed to `YoutubeDl` without the option, it would cause a deadlock
in my bot.

There were many videos where it produced a `Silent` packet first instead
of mixed or passthrough. The URL I added was one that produced a
passthrough packet so I used that. Please let me know if this is wrong.

src/input/metadata/ytdl.rs

@@ -3,7 +3,7 @@ use crate::constants::SAMPLE_RATE_RAW;
 use serde::{Deserialize, Serialize};
 use std::{collections::HashMap, time::Duration};
 
-#[derive(Deserialize, Serialize)]
+#[derive(Deserialize, Serialize, Debug)]
 pub struct Output {
     pub artist: Option<String>,
     pub album: Option<String>,