I’ve edited static blocks using Elementor https://gyazo.com/c4dca594599f4af991f0ea19b0dbe4d4 . There is no visible problem, please check – https://gyazo.com/6a55094d6c9b9ef12d74efd4a59d43a3
What exactly video did you watch? Make sure you did not use WPBakery to edit the content that was created using Elementor. I’ve disabled WPBakery plugin on your site.
-with new screenshots.
how add products in Categories
– edit product > set Product categories
https://woocommerce.com/document/managing-product-taxonomies/
Regards