How to Implement Lazy Load on Images and Videos in WordPress

The average web pages weight in at 1820 kB with images and videos making up nearly 73% of the total weight according to the HTTP Archive. That’s a lot of bytes for a website visitor’s browser to download and render, and the trends all point to larger web pages and increased used of images in the future. WordPress is leading the charge when it comes to sharing media and incorporating media files into the site design. With WordPress it’s easy to integrate images and videos into posts, pages, and even into the background of the theme. However, all those heavy resources make downloading a web page a costly experience as users that have to wait for large files to download — including files that aren’t initially visible — before viewing a web page. This is where WordPress lazy load comes into the picture. Lazy loading is an optimization technique that loads visible content but delays the downloading and rendering of content that appears below the fold. It’s just the sort of thing
It’s just the sort of thing Google gets excited about, and it’s a technique you should consider if your posts and pages include a lot of embedded videos and high-resolution
Source: https://managewp.org/articles/14092/how-to-implement-lazy-load-on-images-and-videos-in-wordpress

source https://williechiu40.wordpress.com/2016/12/28/how-to-implement-lazy-load-on-images-and-videos-in-wordpress/