No, see the problem is that you’re using a plugin at all. When you enable these plugins, you’re overriding what the theme does. The first time, you had another plugin enabled that was overriding the theme’s filter on videos. And now, although it’s giving you the result you want, you still have a plugin overriding what the theme does. Just disable all your video plugins, and the theme will make the fluid by default.
This is searchable archive of our old support forums, which operated from 2012 - 2016. To find out how to get support for your current theme, please visit our support page.