Embed a Video Clip
How to...
First, find the video clip you wish to embed from YouTube, Vimeo, etc. and copy the URL.
Next, visit the Embed Responsively website: embedresponsively.com
Here, paste the video link and click Embed:

A preview of your video will appear. Scroll down and copy the generated embed code:

Return to your website and add/open a HTML Content Item where the video will live. In the editor, click HTML to open the Source Code modal. Paste the code here:

Save (Publish).
Note
- you'll need to Preview or Publish to see the video, it does not appear while in editing mode (it will look like a tiny dot)

- always use this method to ensure video clips size/resize to fit any screen type (desktop, tablet, mobile)