Multiple Songs in a video but only one listed in the metadata

[goose3gg]

Checklist

• I'm reporting a site feature request
• I've verified that I'm running youtube-dl version 2020.01.24
• I've searched the bugtracker for similar site feature requests including closed ones

Description

I'm trying to collect the metadata from playlists from tango djs. Each video they post has several tracks in it however only one is listed in the metadata json file.

Example: https://www.youtube.com/watch?v=yKJ4C1srV0o

For the above example, I get the following:

 track:  "Resentimiento"
 artist:  "Rafael Canaro"
 album: "Buenos Aires - Paris (Para Entendidos)"

However I think it should show:

track: 
 0: "Resentimiento"
 1: "Ojos Muertos"
 2: "El once"
 3: "Isla de Capri"
artist:  "Rafael Canaro"
album:  "Buenos Aires - Paris (Para Entendidos)"