CobaltApps

With this Plugin you can easily overlay all of your iFrame video embeds with either a default image 
provided by the Plugin or your own custom image. This is ideal for branding your videos, making them 
load faster, look cleaner and respond to the width of the browser/device.
An alternate feature of this Plugin is to simply make your iFrame video embeds fully responsive 
so that they perfectly fit any smaller browser window or device.
Either feature will wrap your iFrame video embeds in unique HTML divs which allow you to easily style 
your videos independently or as a whole.
See more of my work over at <a href="http://catalysttheme.com" rel="nofollow ugc">CatalystTheme.com</a>.

Video Overlayer

Video Overlayer is a Plugin that overlays your embedded iFrame videos with an image. Make your embedded videos responsive, branded, cleaner, faster.

CherryPick Studios

Surbma

WARNING! You have to activate Jetpack by WordPress.com plugin first. This plugin is not working without Jetpack.
Jetpack includes an option to add responsive video support to your website and thus make sure that all videos display just as nicely on mobile devices as they do on your largest display.
One of the things that is often overlooked when developing a responsive theme is making videos responsive.
This plugin ensures that any videos are responsive, no additional markup or special coding required. It just works! Every video on your site will display just as nicely on mobile devices as they do on your largest display.
Do you want to contribute or help improving this plugin?
You can find it on GitHub: <a href="https://github.com/Surbma/surbma-jetpack-responsive-videos" rel="nofollow ugc">https://github.com/Surbma/surbma-jetpack-responsive-videos</a>
You can find my other plugins and projects on GitHub:
<a href="https://github.com/Surbma" rel="nofollow ugc">https://github.com/Surbma</a>
Please feel free to contribute, help or recommend any new features for my plugins, themes and other projects.
Do you want to know more about me?
Visit my webpage: <a href="https://surbma.com/" rel="nofollow ugc">Surbma.com</a>

Surbma | Jetpack Responsive Videos

Adds Jetpack's responsive video support to your website.

Video Overlayer vs Surbma | Jetpack Responsive Videos