ThinkSmall

This minimalist lazyloader makes your video pages slimmer and faster. SlimFast replaces heavy YouTube iframes by their thumbnail. <a href="https://thinksmall.me" rel="nofollow ugc">View a demo.</a>
<h4>How to use it?</h4>
Paste the url of the YouTube video in a page (for example <code>https://youtu.be/neV3EPgvZ3g</code>). WordPress will convert it into a video iframe. SlimFast will take it from there and replace the iframe by the video thumbnail and a button to play the video. This will also work for all pre-existing videos embedded this way.
<h4>What is lazyloading and why is it important to use it on YouTube videos?</h4>
Lazyloading is a technique to make your pages load faster, by only loading required elements when the visitor requests them. The page speed is a key element in Google’s algorithm to rank pages.
Embedding a YouTube iframe will load a lot of scripts for every single video and will slow down your page, especially if your visitor doesn’t have a top connection. Hence the need for lazyloaders!
2 types of lazyloaders exist:
<ul>
<li>
Those who load the video iframe when the visitor scrolls down to the point where he sees the video on his screen.
</li>
<li>
Those who load the iframe after the visitor clicks the Play button. SlimFast is one of those. We believe it is the best approach to let your visitor decide if he wants to click or not, and only load the iframe if he clicks.
</li>
</ul>
See a comparison of performances with/without SlimFast in the “Screenshots” section.
<h4>Why is SlimFast better than other YouTube lazyloading plugins?</h4>
<ol>
<li>
Because they require 2 click to play a video: 1 to load the iframe, 1 to play it! This is actually the reason why we built this plugin: SlimFast loads & play videos with 1 single click, even on mobile! Think about your User Experience, it’s crucial. Your visitors are frustrated if they have to click twice on that Play button to launch a video!
</li>
<li>
Because it doesn’t use any custom shortcode. WordPress already recognises YouTube videos when you paste their urls. SlimFast takes it from there. Why bother with shortcodes? Think long term! Shortcodes are painful if you decide to drop a plugin. If you’re unhappy with SlimFast, just deactivate it and all your YouTube videos will be back to their default iframes.
</li>
<li>
Because we’ve made it as light as possible! The plugin only adds 3 small scripts (YouTube iframe API, 1 custom javascript and 1 css) to your pages containing YouTube videos, for an extra weight of 4KB only. And nothing will be loaded if your pages don’t have YouTube videos! This is why you’ll only see 1 custom setting. We decided to sacrifice all settings (such as playlists support and video titles) that would add unnecessary weight. How many options do you really need on your WordPress plugins?
</li>
</ol>
<h4>Is it possible not to use SlimFast on specific videos?</h4>
Of course! Juste paste the iframe code provided by YouTube (for example <code><iframe width= »560″ height= »315″ src= »https://www.youtube.com/embed/neV3EPgvZ3g » frameborder= »0″ allow= »accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture » allowfullscreen></iframe></code>) and SlimFast will leave it intact. Do it if you feel like certain videos deserve features we’ve cut.
<h4>What is in the code?</h4>
<ul>
<li>Just 3 little scripts (YouTube iframe API, 1 custom javascript and 1 css).</li>
<li>These will be loaded on your pages containing YouTube videos for an extra weight of 4KB only. Nothing will be loaded on pages that don’t host YouTube videos.</li>
<li>No JavaScript library such as jQuery is used to ensure a maximum compatibility with all themes.</li>
</ul>
<h3>Demo</h3>
<a href="https://thinksmall.me" rel="nofollow ugc">View a demo.</a>

SlimFast – YouTube Lazyloader

This minimalist lazyloader makes your video pages slimmer and faster. SlimFast replaces heavy YouTube iframes by their thumbnail. View a demo.

Arya Dhiratara

Think Digital Agency

A drop dead simple and lightweight image, iframe, and video optimization plugin to satisfy Google PageSpeed Insights, Lighthouse, and overall user experience.
This tiny little plugin (around 14kb zipped) will automatically
<ul>
<li>lazyload your below the fold images/iframes/videos,</li>
<li>preload your featured images (should also works well with WooCommerce product featured image),</li>
<li>add loading=”eager” to your featured image and all images that have <code>no-lazy</code> or <code>skip-lazy</code> class.</li>
<li>add missing image dimension to images that doesn’t have width and height attribute</li>
</ul>
<h3>Features</h3>
<ul>
<li>Lazy Load:
<ul>
<li>Images, iframes, and videos.</li>
<li>Inline background images.</li>
<li>CSS background image (simply put <code>lazyload</code> class to the background image container)</li>
</ul>
</li>
<li>Preload Featured Images 
Automatically preloading featured image from common page/post (homepage, pages except homepage, single post, and WooCommerce single product pages)</li>
<li>Add loading=”eager” attribute to to your featured image and all images that have <code>no-lazy</code> or <code>skip-lazy</code> class.</li>
<li>Add missing image dimension to images that doesn’t have width and height attribute [since 1.0.3]</li>
</ul>
Should works well with all page builders and theme builders. This plugin also able to lazy loading WooCommerce images and preloading WooCommerce product featured images.
<h3>Disclaimer</h3>
<ul>
<li>Lazy load feature are using Lazysizes library (around 3kb, gzipped and minified).</li>
<li>This plugin doesn’t add anything to your database since there’s no settings and options. Everything will automatically activated after you activate the plugin.</li>
<li>You can change some default settings using filter.</li>
<li>This plugin is the simplified version of <a href="https://wordpress.org/plugins/optimize-more-images/" rel="ugc">Optimize More! – Images</a>, if you don’t want to use filters and need to control the settings with UI, you can try that plugin instead of this one.</li>
</ul>
<h3>About Lazysizes</h3>
Lazysizes is highly performant lazy load library, written by Alexander Farkas in pure JS with no dependencies.
Taken from lazysize’s github description: 
High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.
<h3>Filters</h3>
Example filter to add extra lazyload exclude list:
<pre><code>add_filter( 'lpam_extra_exclude_list', function($lpam_extra_exclude_list) {
 return array( 
 'my-logo', 'my-hero-img', 'exclude-lazy'
 );
} );
</code></pre>
Example filter to change lazysizes config (Read the <a href="https://github.com/aFarkas/lazysizes/#js-api---options" rel="nofollow ugc">docs</a>):
<pre><code>add_filter( 'lpam_lazysizes_js_before', function($lpam_lazysizes_js_before) {
 return 'window.lazySizesConfig = {
 expand: 500,
 threshold: 500
 };'
} );
</code></pre>
Example filter to change the image sizes for preload featured image:
<pre><code>add_filter( 'lpam_preload_featured_images_image_size', function($image_size, $post) {
 if ( is_singular( 'post' ) ) { return 'large'; }
 elseif ( is_singular( 'product' ) ) { return 'full'; }
 else { return $image_size; }
}, 10, 2 );
</code></pre>
[new since 1.0.2] Example to disable the preload featured image feature in certain page-type:
<pre><code>add_filter('disable_featured_image_preload', function ($disable) {
 if ( is_singular( 'post' ) ) {
 return true;
 }
});
</code></pre>
[new since 1.0.3] Example to disable adding image dimension in certain page-type:
<pre><code>add_filter('disable_img_dimension', function ($disable) {
 if ( is_singular( 'post' ) ) {
 return true;
 }
});
</code></pre>
[new since 1.0.3] Example to disable this plugin completely in certain page using url:
<pre><code>add_filter('lazy_load_excluded_pages', function ($excludedPages) {
 $excludedPages[] = '/page-1';
 $excludedPages[] = '/page-2';
 return $excludedPages;
});
</code></pre>
[new since 1.0.3] Example to disable this plugin completely in certain page using page ID:
<pre><code>add_filter('lazy_load_excluded_page_ids', function ($excludedPageIDs) {
 $excludedPageIDs[] = 3678; // Exclude page with ID 1
 $excludedPageIDs[] = 3615; // Exclude page with ID 2
 return $excludedPageIDs;
});
</code></pre>
[new since 1.0.4] To disable the tag:
<pre><code>add_filter('disable_noscript', '__return_true');
</code></pre>
 
<h3>USEFUL PLUGINS TO OPTIMIZE YOUR SITE’S SPEED:</h3>
<ul>
<li>
<a href="https://wordpress.org/plugins/optimize-more/" rel="ugc">Optimize More!</a>: A Do It Yourself WordPress Optimization Plugin that give you the ability to:
<ul>
<li>
Load CSS Asynchronously – selectively load CSS file(s) asynchronously on selected post/page types.
</li>
<li>
Delay CSS and JS until User Interaction – selectively delay CSS/JS load until user interaction on selected post/page types.
</li>
<li>
Preload Critical CSS, JS, and Font Files – selectively preload critical CSS/JS/Font file(s) on selected post/page types.
</li>
<li>
Remove Unused CSS and JS Files – selectively remove unused CSS/JS file(s) on selected post/page types.
</li>
<li>
Defer JS – selectively defer loading JavaScript file(s) on selected post/page types.
</li>
<li>
Advance Defer JS – hold JavaScripts load until everything else has been loaded. Adapted from the legendary varvy’s defer js method *recommended for defer loading 3rd party scripts like ads, pixels, and trackers
</li>
<li>
Load Gutenberg CSS conditionally
</li>
<li>
Remove Passive Listener Warnings
</li>
<li>and many more</li>
</ul>
</li>
</ul>
<h3>Other USEFUL PLUGIN:</h3>
<ul>
<li>
<a href="https://wordpress.org/plugins/shop-extra/" rel="ugc">Shop Extra</a> – A lightweight plugin to optimize your WooCommerce & Business site that makes you able to:
<ul>
<li>add Floating WhatsApp Chat Widget (can be use without WooCommerce),</li>
<li>add WhatsApp Order Button for WooCommrece,</li>
<li>Hide/Disable WooCommerce Elements,</li>
<li>WooCommerce Strings Translations,</li>
<li>and many more.</li>
</ul>
</li>
<li>
<a href="https://wordpress.org/plugins/animate-on-scroll/" rel="ugc">Animate on Scroll</a> – Animate any Elements on scroll using the popular AOS JS library simply by adding class names. This plugin helps you integrate easily with AOS JS library to add any AOS animations to WordPress. Simply add the desired AOS animation to your element class name with “aos-” prefix and the plugin will add the corresponding aos attribute to the element tag.
</li>
</ul>
<h3>Optimize More!</h3>
Need to optimize more? Try my <a href="https://thinkdigital.co.id/services/speed-optimization/" rel="nofollow ugc">WordPress Page Speed Optimization’s Service</a>.

Lazyload, Preload, and More!

A drop dead simple and lightweight image, iframe, and video optimization plugin to satisfy Google PageSpeed Insights and Core Web Vitals.

SlimFast – YouTube Lazyloader vs Lazyload, Preload, and More!