NOT lazyload; click a button instead anywhere in the whole <iframe> element so one won't mis-click; will ignore small / narrow <iframe>s.
Ajankohdalta
Just modify the code to change the behavior. If you need a lazyload version, but can't code it yourself, I'm glad to say now you can do this by just set loading=lazy attribute to the <iframe> (and <img>) elements, for newest modern browsers:
And there are some lazyload libs for reference, for older browsers. Here is one of them:
