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.

Ulrich

Standalone JavaScript for fluid YouTube/Vimeo iframe embeds. Add more video players and selectors easily in the media settings.
Description of the Fluidvids script 
“Fluidvids is a 1KB standalone module that provides a fluid solution for video embeds. Fluidvids has the ability for custom players to be added as well as support for dynamically injected (XHR/Ajax/createElement) videos.
Check out a <a href="http://toddmotto.com/labs/fluidvids" rel="nofollow ugc">demo of fluidvids</a>“
<h3>Credits</h3>
The plugin can also be found on <a href="https://github.com/grappler/fluidvids" rel="nofollow ugc">GitHub</a>.
<ul>
<li>Thank you <a href="http://toddmot.to/" rel="nofollow ugc">Todd Motto</a> for <a href="https://github.com/toddmotto/fluidvids" rel="nofollow ugc">fluidvids.js</a></li>
<li>Thank you <a href="http://tommcfarlin.com/" rel="nofollow ugc">Tom McFarlin</a> for the <a href="https://github.com/tommcfarlin/WordPress-Plugin-Boilerplate" rel="nofollow ugc">WordPress Plugin Boilerplate</a></li>
</ul>

Fluidvids for WordPress

Standalone JavaScript for fluid YouTube/Vimeo iframe embeds. Easily add additional video players and selectors in the settings.

Responsive Video Embedder vs Fluidvids for WordPress