To quickly embed a Kickstarter video, copy the project’s URL from your web browser’s address bar, and paste it on a line by itself in your post/page editor:

We take care of the rest! The video will look something like this:
You can also add a shortcode to any page or post using a shortcode block as follows:
[kickstarter url=https://www.kickstarter.com/projects/monomythgames/need-to-know-the-mass-surveillance-thriller-game]
https://www.kickstarter.com/projects/monomythgames/need-to-know-the-mass-surveillance-thriller-game