First, place your cursor in the text where you want to embed the video.

Select Insert from the menu, and click Media.

A dialog box will appear for inserting media. It automatically shows the general screen, which is for images. 

On the left side, select Embed. The dialog box will then show you space to embed the video code.

You will need to copy the embed code from the video's host, whether that is YouTube, Vimeo, or another provider. The embed code will display like the following example.

Once you've copied the embed code, paste it into the dialog box. Click Save. 

The dialog box will close, and your video will be embedded within the text editor.

At the bottom of the editor sidebar, click the blue Save button to publish the video to your website.