How to defer JavaScript parsing and lazy load YouTube embeds using EmbedPlus.com's WordPress plugin
Every YouTube embed, no matter how you embed it, loads an unavoidable 1MB+ of scripts from YouTube.com's servers. This can significantly affect your load times and page speed scores. We quantify that effect using GTmetrix and show how deferring the EmbedPlus.com plugin's scripts and lazy loading the YouTube iframe eliminates the problem.
Learn more here: https://www.embedplus.com/defer-parsi...
Try out GTmetrix here: https://gtmetrix.com/