Lazy Load Stack for iFrames?

Hey all,

is there a Lazy Load Stack for iFrames? Rapid-Ideas released one but it’s only for images.
Or a different approach: Is it complicated to incorporate a custom js script into Rapidweaver?
Like this one: GitHub - aFarkas/lazysizes: High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.

Cheers!

Stevie

Apparently there is a way to make Soundcloud iFrames load faster, which is exactly what I want to achieve. But I can’t get my head around it, respectively: it doesn’t work for me :frowning:
Maybe somone can help here?