Post Format: Video (Pro only)
Kale Pro 1.3+ supports video format posts.
On the post edit screen, choose the "Video" format to display a special box where you can enter the YouTube video embed link, for example https://www.youtube.com/embed/ETxOJyuGFgQ.
Make sure this is the embed link and not the main video link.
This will create a video post on the front end, which can be played directly from the blog feed.