molotow

Defer Media is a plugin for speed up your website and defer not needed medias which out of the screen when page loaded. 
Then, when you scroll down the page, it will load images/videos/iframes automatically or pre-load it even if it it not visible yet (can be adjusted with Appearance Offset parameters).
This plugin will apply the following actions: 
– Defer images (standard [img] tag and also [picture] src sets) 
– Defer background images (if style=”background-image” applied for some block) 
– Defer Videos ([video], [source] tags) 
– Defer Youtube embedded videos (iframe) 
– Defer any Iframes ([iframe] tag)
You can see plugin demo on this page: 
<a href="https://joomcar.net/wp-optimize/a-lot-of-media-page/" rel="nofollow ugc">Defer Media demo</a>

Defer Media

This plugin defer images and videos loading on your site for make it faster

yasir129

Specify Missing Image Dimensions is a WordPress plugin that helps to add missing width and height attributes to images. This plugin scans the entire HTML page and specify missing width and height to tags.
If you are seeing error like “Image elements do not have explicit width and height” on <a href="https://developers.google.com/speed/pagespeed/insights/" rel="nofollow ugc">Google PageSpeed Insights</a> then this plugin will help you to remove that error by adding missing width and height attributes to the required images.
By adding width and height to the images, Cumulative Layout Shift (CLS) also improves as there will be no more unwanted jumps while HTML page rendering.
<h3>How this Plugin Works</h3>
<ol>
<li>Specify Missing Image Dimensions plugin scans the entire HTML page and finds images with missing width and height attributes.</li>
<li>After finding the images, this plugin gets the image dimensions using getimagesize() function.</li>
<li>After getting the required dimensions, plugin adds the width and height attributes to the images.</li>
</ol>
<h3>Features</h3>
<ul>
<li>Exclude images by image extension</li>
<li>Exclude images by image Name</li>
<li>Exclude images by class</li>
<li>Exclude images by ID</li>
</ul>

Specify Missing Image Dimensions

This plugin helps to add missing width and height attributes to images.

Defer Media vs Specify Missing Image Dimensions