Disable Lazy Loading
Toggling this setting will disable YouTube Video Player thumbnail lazy loading.
If the YouTube Video Player is the first image on the page and is visible straight after the page loads, it should be set not to lazy load and this toggle should be active.
Images with lazy loading attribute will be downloaded after the page has been loaded and the image is visible on the user's screen. While images without the lazy loading attribute will be downloaded when the page is being initially loaded.
Ideally all the images should be lazy loaded since this improves the website speed and performance. However, all images that are shown on the page 'above the fold' - seen immediately without having to scroll, should be set not to lazy load.