Hello,
I’ve edited static blocks using Elementor https://prnt.sc/3a_WY965wrXG . There is no visible problem, please check – https://prnt.sc/b3FwdwXnZrZV
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.
Regards