Yes it should work with responsive and non-responsive sites. The video was done for Designer Pro 9 is a bit outdated, it refers to giving a name footerBackground but the newest version of the tweak relies on class names instead so in xara when applying the name use htmlclass=footerBackground instead of just footerBackground. Follow the instructions in the xar file over the video but the video should still be a good general guide. The footerstart/end placeholders shouldn't need to be changed, there is already the javascript in the head section of the footerstart placeholder.