SlimFast – YouTube Lazyloader
This minimalist lazyloader makes your video pages slimmer and faster. SlimFast replaces heavy YouTube iframes by their thumbnail. View a demo.
5(1 reviews)
·20 active installs·Updated 5 years agoAs of April 2026, SlimFast is a WordPress video plugin with 20 active installations and a 5/5 rating from 1 reviews. It has been downloaded 1.4K+ times in total. Requires WordPress 4.4+ and PHP false+. Available on WordPress.org since 2020. Last updated 5 years ago — may have compatibility concerns. Top alternative: The Ultimate Video Player For WordPress….
5/51 reviews
20active installs
1.4K+total downloads
6 yearssince 2020
Overview
This minimalist lazyloader makes your video pages slimmer and faster. SlimFast replaces heavy YouTube iframes by their thumbnail. View a demo.
How to use it?
Paste the url of the YouTube video in a page (for example https://youtu.be/neV3EPgvZ3g). 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.
What is lazyloading and why is it important to use it on YouTube videos?
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 ev…
Screenshots
Ratings & Reviews
51 reviews
5 ★
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Compatibility
| WordPress | 4.4+ requiredTested up to 5.4.19 |
| PHP | false+ required |
Top Alternatives to SlimFast – YouTube Lazyloader
Frequently Asked Questions
Changelog
1.0.1
- Changing the default thumbnail served from YouTube to hqdefault format, which exists for all videos, unlike the sddefault format which lead to a grey thumbnail for some videos. The hqdefault format is also lighter than the ssdefault, which will improve furthermore speed performances.
- Reducing the default video size to 560px to match with YouTube’s iframe default size.
Contributors
Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.