how do i make a song work

my friend and i was helping me add music to my profile. we embed the song and did everything that we could do

here is the code 
<iframe width="1" height="1" src="https://www.youtube.com/embed/w4htGqzeFL4?si=_knf9Pc4kbwVPE2g"//?&;amp;;autoplay=1&;loop=1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen=""></iframe>

please tell me how to fix it