This Joomla! module uses http://fitvidsjs.com to make a video embed responsive. It's all contained in a module so you can put it anywhere on your site and not worry about it.
There are no options apart from entering the video embed code. It's that simple. The module supports the same embeds as FitVids itself does so primarily YouTube, Vimeo and Kickstarter.
I am actively looking to improve my modules at the moment. If you have any suggestions or need help please let me know via email.