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

godie322

joshvickers

Satellite is an optimization plugin which reviews your site for easy ways to instantly improve your WordPress website’s performance. These recommendations include metrics such as updating plugins, removing inactive themes, emptying spam comments, using a CDN, and known plugin conflicts.
Checks:
<ul>
<li>Poor Rated Plugins</li>
<li>Unsupported Plugins</li>
<li>Post revisions</li>
<li>Host</li>
<li>SEO plugin</li>
<li>Trash size</li>
<li>Spam comments</li>
<li>Search engine visibility</li>
<li>Outdated plugins</li>
<li>Outdated WordPress version</li>
<li>SSL certificate</li>
<li>Inactive themes</li>
<li>Performance damaging plugins</li>
<li>Caching solution</li>
<li>Backup solution</li>
<li>Host disallowed plugins</li>
<li>Inactive plugins</li>
<li>Number of active plugins</li>
<li>DNS records</li>
<li>Email records</li>
<li>Website size</li>
<li>Image optimization</li>
<li>JS, CSS optimization</li>
</ul>

Satellite Optimization Monitoring

Satellite is a simple WordPress optimization reporting tool. Get actionable metrics you can use to improve your website's performance.

Defer Media vs Satellite Optimization Monitoring