Storyline: Befriending a Monstera Glassmorphism Template

It's a very nice effect. It appears, however, that the larger glass overlays are done in a video editor, with the smaller boxes and text content on the menu being added in Storyline; same with the text and buttons on the individual content pages overlaying the still images (but done in an image editor). I don't see a way in Storyline alone to create that blurred effect of the glass overlaying the background video, so that has to be at the video and image level. Is that correct?

I have the same question. I like the blur effect. Is this effect something that can be accomplished within Storyline itself?