If you want to embed video or audio, just go to Youtube/Vimeo/Bandcamp/Soundcloud etc., select "share" or "embed" and copy and paste the embed code into the musify editor's "Type here!" box. It's really that simple.

<iframe width="560" height="315" src="http://www.youtube.com/embed/A6s49OKp6aE?rel=0" frameborder="0" allowfullscreen></iframe>