This update adds proper Gutenberg block editor support and comes with a ton of technical refactors and updates.
From the changelog:
New feature: Properly preview and play videos in the (Gutenberg) block editor with the same thumbnails and styles that your readers will see
Increased minimum browser support from IE10 to IE11
Smarter code splitting: Now Webpack splits shared code into separate bundles so that developers don't need to manually maintain an extra Webpack entry. WordPress will load up three JS files if both Youtube and Vimeo are supported on your blog: lazyload-shared.js, lazyload-youtube.js, lazyload-vimeo.js, instead of one big lazyload-all.js
Allow filtering Vimeo-specific CSS classes using "lazyload_preview_url_css_vimeo" filter
Rename folder "assets" to "public"
Rename filter lazyload_preview_url_a_class_youtube to lazyload_preview_url_class_youtube
Use "wp_add_inline_script" (requires WordPress 4.5 or higher) instead of "wp_localize_script" and improve how scripts are being loaded
Increase minimum WordPress version to 4.5
The Youtube and Video configs are now stored in window.llvConfig instead of window.lazyload_video_settings
Remove RTL-specific CSS used for admin panel because it wasn't properly maintained
Delete oembed caches when uninstalling plugin, not just when deactivating it
Delete transient oembed caches whenever oembed caches get deleted
No longer run $.bindFirst
Database: Rename value associated with standard thumbnail quality from "0" to "basic". This value is stored in the "lazyload_thumbnail_quality" post meta row
Database: No longer add a "lazyload_thumbnail_quality" field to the DB if the value is "default"
Database: Remove "lazyload_thumbnail_quality" post meta when uninstalling the plugin
This update adds proper Gutenberg block editor support and comes with a ton of technical refactors and updates.
From the changelog: