Working with Embedded Content
Doki's lesson editor (and in some other content editing areas) supports a limited range of `<iframe>` embeds from trusted sources on the web. The supported locations are detailed below in alphabetical order. In most cases you can copy and paste the iframe right into the content area to embed it. Need to embed from somewhere else? You can request that the location be whitelisted by sending an email to firstname.lastname@example.org.