I would like to use amp-ad's in a preview environment. The constraint of the preview environment is that we are not allowed to serve ads via a request.
A common use case for creative ad tech developers is to use iframes and their srcdoc attribute to render ads and debug them.
As a result, I try'd to get a amp-ad rendering via a srcdoc but didn't have any luck. Is it possible to use the srcdoc attribute or insert html into a amp-ad frame without making requests to an external or internal source.
The way AMP allows for 3rd party content to render in amp-ads is through the amp-3p-custom-ad meta tag.