marckula

This plugin registers Haiku Deck ( haikudeck.com ) as an oEmbed content provider and adds it to the whitelist, allowing all users to use this provider.
Here’s more information about embeds for WordPress 
https://codex.wordpress.org/Embeds

Haiku Deck for WordPress

Register Haiku Deck as an oEmbed content provider

scribit.pro

We’re making it even easier to publish accessible videos on your WordPress site! With the Scribit.Pro WordPress plugin 
you’ll be able to add Audio Descriptions and Text Alternatives to your YouTube and Vimeo videos without any coding.

Scribit.Pro

Online video from your WordPress site accessible to all.

Haiku Deck for WordPress vs Scribit.Pro