Add docs for HTMLEmbedElement.src (#33553)

* add docs

* fix

files/en-us/web/api/htmlembedelement/src/index.md

@@ -0,0 +1,42 @@
+---
+title: "HTMLEmbedElement: src property"
+short-title: src
+slug: Web/API/HTMLEmbedElement/src
+page-type: web-api-instance-property
+browser-compat: api.HTMLEmbedElement.src
+---
+
+{{APIRef("HTML DOM")}}
+
+The **`src`** property of the {{domxref("HTMLEmbedElement")}} interface returns a string that indicates the URL of the resource being embedded.
+
+It reflects the `src` attribute of the {{HTMLElement("embed")}} element.
+
+## Value
+
+A string.
+
+## Examples
+
+```html
+<embed
+  id="el"
+  type="video/quicktime"
+  src="movie.mov"
+  width="640"
+  height="480"
+  title="Title of my video" />
+```
+
+```js
+const el = document.getElementById("el");
+console.log(el.src); // Output: "movie.mov"
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}