First, watch the video to learn how to use this type of theme. Then, replace the video by selecting it and clicking on the "Embed Options" tab on the right. Then, simply paste in the direct link to YouTube or Vimeo. Hide this element when you're finished.
If you would rather embed a video or stream from a different service, use the "Video Block - IFrame", which can be found hidden in the Layout Tab.
Need more help? Here are some great Help Center articles regarding embed best-practices:
First, watch the video to learn how to use this type of theme. Then, replace the iFrame embed code of the video below by clicking into it and clicking on the "Embed Options" tab on the right. Hide this element when you're finished.
Need more help? Here are some great Help Center articles regarding embed best-practices: