Tauno Hanni

This plugin prevents Youtube and Vimeo players to block page rendering. Maybe you have recognized that pages that have a lot of embed videos are loading slowly. This is caused by the vendors video players that need to be downloaded and initialized before website can be used by the user. This plugin stops this behavior and makes page load faster.
This plugin will automatically resize your videos in a responsive fashion.

Better oEmbed Video

This plugin prevents Youtube and Vimeo players to block page rendering.

Chris Rowley

Automatically adapt your embedded videos to the full width of their containers while maintaining the correct aspect ratio.
This is a simple filter that scans each embed in your posts, pages and custom post types, reads the width and height on the <code>iframe</code> and adds a style attribute including CSS <code>width</code>, <code>height</code> and <code>aspect-ratio</code> properties.
Currently supporting YouTube, Vimeo, WordPress/VideoPress and DailyMotion.

Easy Responsive Video

Easy Responsive Video adapts oEmbed video to full width while maintaining aspect ratio.

Better oEmbed Video vs Easy Responsive Video