IMPR: Store Carousel UI at the element, fix embed video aspect ratio

src/js/ui/carousel.js

@@ -9,6 +9,8 @@ const CarouselUI = ((window) => {
 
     document.querySelectorAll(`.${NAME}`).forEach((el, i) => {
       const carousel = new Carousel(el);
+      el.ui = carousel;
+      
       // create next/prev arrows
       if (el.dataset.bsArrows) {
         const next = document.createElement("button");

src/scss/types/editor.scss

@@ -242,3 +242,15 @@ img {
 img {
   border: 1px dashed;
 }
+
+.ss-htmleditorfield-file.embed {
+  @include responsive-ratio(4,3,true);
+      position: relative;
+      iframe {
+        position: absolute;
+        left: 0;
+        right: 0;
+        top:0;
+        bottom: 0;
+      }
+}