【My Study Load】Fullpage.js
Fullpage.js

Lazy LoadingLazy Loading
fullPage.js provides a way to lazy load images, videos and audio elements so they won’t slow down the loading of your site or unnecessarily waste data transfer. When using lazy loading, all these elements will only get loaded when entering in the viewport. To enable lazy loading all you need to do is change your src attribute to data-src as shown below
<img data-src="image.png">
<video>
<source data-src="video.webm" type="video/webm" />
<source data-src="video.mp4" type="video/mp4" />
</video>
If you already use another lazy load solution which uses data-src as well, you can disable the fullPage.js lazy loading by setting the option lazyLoading: false.