TL;DR
1
Embed a Video
In the open field, type /embed or use the + button to select Video Embed.
2
Copy Embed code
Copy the embed code from a video.
3
Paste code into Doc
Paste the Embed code into the Video Embed field.
Let's Do It Together!
1. Embed a Video
Hover over an open field, click the + icon, then find the article section and select Video Embed.
Alternatively, type /embed in the open field. Select Video Embed.

2. Copy Embed Code
Find the Video you want to Embed and click the Share button.
Next, click the Embed button.
Copy the source Embed code provided for the video.

3. Paste Embed Code into the Doc
Return to your Doc and paste the Embed code into the Paste Embed URL box.
Resize the video window by dragging the buttons on the sides.

FAQ
How do I get the embed code from YouTube?
Open the YouTube Video, click Share, then click Embed. Copy the Embed code.
Where do I paste the Embed code?
In your article, paste the code into the "Embed URL" field when opening an "Embed Video" field.
How do I resize an Embedded Video?
Drag the resize handles on the sides of the Video window.
