Ryan Burnette

There are a lot of plugins that allow users to embed videos using a shortcode. 
Now there’s one more out there.
Video Embeds currently supports YouTube and Vimeo.
Video Embeds allows for control over many of YouTube’s embed paramaters and 
all of Vimeo’s embed parameters. Set default values for all available options 
on the settings page.
Add FitVids.js to your site with the click of a button.
And a few other things too.

Video Embeds

Just another plugin that creates shortcodes for embedding videos in posts.

jschuller

Easily embed video within your posts. Adds a widget to the posting screen that enables you to post videos by simply providing the URL to the video hosted on common video sharing websites.
<h3>Usage</h3>
<ol>
<li>Within the WordPress Administration Control Panel, expand the Posts tab and then select Add New.</li>
<li>Create a title for your post and add a description within the post field.</li>
<li>Paste the URL to the video you wish to embed within the Video URL field.</li>
<li>Enter the Width and Height parameters for your video within the fields provided (optional).</li>
<li>Click Update Post to save your options.</li>
<li>Once the page reloads, a full preview of your embedded video should be displayed.</li>
</ol>

Simple Video Embedder

Adds a widget to the posting screen that makes posting videos a cinch.

Video Embeds vs Simple Video Embedder