Alex Raven

This plugin adds a button to post editor to insert videos and video playlists easily. Simply click the button, paste YoutubeURL 
and kick Insert Video. Support for other video hostings will be added later. Video embedding can be used as a shortcode in posts 
and pages, including custom post types.
A few notes about the sections above:
<ul>
<li>Simple button in editor to add videos to your pages and posts</li>
<li>Video is embedded responsively – will fit the container, keeping aspect ratio</li>
<li>Supports the following parameters: controls (on/off), autoplay (on/off), autohide controls (on/off), loop (on/off)</li>
</ul>
By clicking > Insert Video button it opens a popup window where you can paste video URL and set parameters. You can also set start time, 
or just leave it 0:00 if you want to play video from the beginning. Playlists are also supported.
It also stores a list of recent videos where you can chose one of the videos you have used before (or saved for future). In later versions, 
there will be something like a video library to access and share videos between multiple wordpress administrators and editors.
This plugin was a part of another bigger project. It was handy and easy to use, so I decided to extract the code to a stand-alone 
plugin and make it available for free for public.
<h3>Usage</h3>
When you use > Insert Video button in post / page editor, it adds a shortcode automatically. Alternatively, you can put a shortcode manually:
[rem_video id=”XXXXX” list=”YYYYY” autplay=0 controls=1 autohide=0 loop=0]
XXXXX is a video ID from Youtube URL, it comes after <code>v=</code>, like https://www.youtube.com/watch?v=mbBmc8RC_S8 
YYYYY is a playlist ID (for playlists), like https://www.youtube.com/watch?v=mbBmc8RC_S8&list=PLCF042F294768BFD1 
autoplay=(0|1): if 1, video will start automatically when your page is loaded. Default is 0 – video will not start automatically. 
autohide=(0|1): if 1, it will hide controls when video is played. Default is 0 – controls will be always visible. 
controls=(0|1): if 1, controls will be shown, if 0 – hidden. Default is 1. 
 loop=(0|1): if 1, when video is ended, it will start from the beginning. If it is a playlist, it will loop from first video in the list.

Responsive Video Embedder

A simple but powerful plugin to embed videos responsively into your Wordpress site. Works with both videos and playlists.

wpszaki

If you are embedding Youtube video(s) into your site then you will need this plugin. As you may (or may not) know the default Youtube embed code is not responsive and in order to load the player itself your browser has to download more than 1MB of data from Youtube’s servers. That is way too much and this is the reason why we made this plugin. A video player has to be lightweight and responsive. Period.
This plugin is replacing the default Youtube player with the video’s high quality thumbnail and a play button. The real player and the video won’t load until you click on the play button or the thumbnail itself. With this easy trick you will have a much lighter and faster website and the thumbnail + the actual player will be responsive too.
Our plugin is only 60KB without any extra library or unnecessary function.
If you are speed-optimizing your site or if you want to reduce the loading times of your pages then you are at the right place.
<h3>This plugin will:</h3>
<ul>
<li>Make all of the embedded Youtube videos responsive automatically</li>
<li>Will reduce the size of your pages (where you have embedded videos)</li>
<li>Will make your site faster</li>
<li>Will improve the user experience</li>
</ul>
<h3>You can also:</h3>
<ul>
<li>
Manually insert a different thumbnail for each embedded video with the ‘thumb_url’ parameter.
[youtube_embed url=”video_url” thumb-url=”custom_thumb_url”]
</li>
<li>
Manually set a different width for each video with the ‘width’ parameter.
[youtube_embed url=”video_url” width=”50″]
</li>
<li>
Manually align each video to left, right or center with the ‘align’ parameter.
[youtube_embed url=”video_url” align=”center”]
</li>
<li>
Disable the related videos
</li>
<li>Disable the video controls</li>
<li>Disable the fullscreen option</li>
<li>Align the videos globally or individually</li>
<li>Set the custom video width for all videos or to just a single video with a shortcode parameter</li>
</ul>
<h3>Comparison</h3>
Here’s a quick comparison with the built-in TwentySeventeen theme (without any other plugin).
We placed a default Youtube video embed code in a new and empty page, ran the tests and then replaced it with our solution before running the tests again.
Total page size with the traditional Youtube embed code: 2.18MB 
Total page size with our lightweight & responsive embedder: 472KB
Page load time with the traditional Youtube embed code: 5.33s 
Page load time with our lightweight & responsive embedder: 2.52s

Lightweight and Responsive Youtube Embed

Make your embedded Youtube videos responsive & lightweight with this plugin. Reduce the loading time of your site and increase the user experience …

Responsive Video Embedder vs Lightweight and Responsive Youtube Embed