Implement mobile-friendly page layout by using Snippets.
You can add as many as you would like.
Many user prefer the drag-and-drop option from the area at the top, right of OU Campus. Click Snippets to get a drop down of the options and drag and drop them to where you want on the page.
Yes, you can nest any content inside of a layout snippet including Youtube embeds, Wufoo forms, test, images, or tables. You should not add layout snippets inside of layout snippets however.