Watch: navigation, sound, and video
In the full walkthrough, a later section adds a navigation bar plus video and audio side by side.
Later in NHDWebCentral Walkthrough, the example adds a navigation bar so a viewer can move from page to page, then saves.
Video and audio go on the page from the blocks: Embed MP3, MP4, or PDF. The video places a video and a sound clip next to each other in an easy layout.
The written steps are in Images, sound, video, and buttons and in Columns, space, and the image carousel.