Can't resize embedded video

I have a video on my site that I wan't to embed from Vimeo, but when I change the width and size numbers in the embed code it doesn't change the size.

Here's the embed code....

<pre class="source-code"><div>&lt;iframe src="https://player.vimeo.com/video/558556463?h=fe15e22038" width="1000" height="568" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" allowfullscreen&gt;&lt;/iframe&gt;
&lt;p&gt;&lt;a href="https://vimeo.com/558556463"&gt;Bea Bitter - Pocket Knife (Official Video)&lt;/a&gt; from &lt;a href="https://vimeo.com/user104858480"&gt;Zephaniah Bean&lt;/a&gt; on &lt;a href="https://vimeo.com"&gt;Vimeo&lt;/a&gt;.&lt;/p&gt;</div></pre>

Can you share link to page where you added the code? We can check easier