The codes for embedding music have change and I used a few hours to try and find out which codes are working.
This code works. The only thing you need to do is copy and paste, but I guess you want another song :-) This is the code for autoplay. <embed width="420" height="315" src="https://www.youtube.com/embed/9YEyuRlSieg?&autoplay=1"><br><br><br>
Find your song/video at YouTube. Copy only the code for the song f.eks. 9YEyuRlSieg and paste it where I marked yellow.
If you do not want autoplay use this code:
<embed width="420" height="315" src="https://www.youtube.com/embed/9YEyuRlSieg"><br><br><br>
The <br>-code is just to make breaks, that you decide yourself how much air you want around.
Hope this helps and have a fun day filled with music.