This is a RapidWeaver theme
The HTML5 Video stack utilizes the latest technologies to play video on your site without flash! It will fall back to a flash based player for browsers that do not support HTML5. You can customize the player theme and colors to match your site design perfectly. A video thumbnail stack is also included that you can use for links or launching your favorite lightbox.

You need the Stacks2 plugin for this. Stacks are not included in this theme.
This is the free ExtraContent stack.
I've added the Responsive Columns stack in the ExtraContent stack.

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Felis aliquet egestas vitae, nibh ante quis quis dolor sed mauris. Erat lectus sem ut lobortis, adipiscing.
Lorem ipsum dolor sit amet, sapien platea morbi dolor lacus nunc, nunc ullamcorper. Felis aliquet egestas vitae, nibh ante quis quis dolor sed mauris.
Erat lectus sem ut lobortis, adipiscing ligula eleifend, sodales fringilla mattis dui nullam. Ac massa aliquet.