hey! you need to edit with WYSIWYG turned off in order for it to work, usually when its turned on is when the playlist breaks. this includes before you update character as well. idk if thats ur situation but its happened to a friend before! also make sure you are only adding the ending numbers/letters of the youtube link to where it should be inserted, not the full youtube link! let me know if it is still not working for you

the background image should be inserted into the second line of the actual code, in this part:

<div class="py-4 px-4 container-fluid mb-1" style="max-width: 900px; background-image: url(IMAGE-URL); background-size: cover; background-position: center; background-color: rgb(0, 0, 0, 0.0); background-repeat: no-repeat; border-radius: 30px;">