Autoplay music?

I just use a soundcloud embed and when you copy it from the website just check off the "autoplay" box :P

<iframe width="0" height="0" src="https://www.youtube.com/embed/<Change there>//?&;amp;;autoplay=1&;loop=1&;playlist=<your video ID>&;controls=1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" loading="lazy">

</iframe>

I'm confused lol does that code get pasted into edit profile? then what part of video code goes into that one

I was using SoundCloud and now it isn't autoplaying