It seems that WYSIWYG was activated during editing so I suggest you disable it from your settings.  Because of that, additional coding in both characters was added that causes the music not to work!

Please delete the span class here (and maybe the amp; but you can leave it haha) :

<span class="fr-video fr-fvc fr-dvb fr-draggable"><iframe src="https://www.youtube.com/embed/YBRCvVpknvg" class="w-100" frameborder="0" style="position:absolute;height:130px;margin-top:20px;left:0;opacity:.001;">&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;nbsp;</iframe></span>