This audio post is displays without a sidebar and has the iframe set for the index pages, instead of a featured image.
For the audio post to work, type must be set to audio and the audio-embed filled with an iframe.
---
type: audio
audio-embed: <iframe width="560" height="315" src="https://www.youtube.com/embed/bzy0qRcdG5M" frameborder="0" allowfullscreen></iframe>
---