JEB
So, basically, it looks like the streamUrl uses a different protocol, RTMP. The json returned by the call on /streams is like {"rtmp_mp3_128_url":"rtmp://ec-rtmp-med.... instead of {"http_mp3_128_url":"https://ec-media.s... So basically, some tracks...
Disregard the comment about that, the problem is just that protocol RTMP... I ended up finding and using that: https://github.com/rg3/youtube-dl easier... Thanks for the answer though, I really appreciate it...
Yes, it does soundcloud. You can probably look at their code to find the solution :) You are welcome, it was fun !
Same issue, it works in prod though, it is only locally that it does not...