Amp-ima-video bug

[spormeon]

Description

it seems that the amp-video-ima component is not supporting video "overlays" I have tested this with the google sample tags on the demo page and can also re-produce it locally,

Reproduction Steps

if you put this tag in the demo page it will not show an "overlay"https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/nonlinear_ad_samples&sz=480x70&cust_params=sample_ct%3Dnonlinear&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&correlator=

in demo page: https://playground.amp.dev/?url=https%3A%2F%2Fpreview.amp.dev%2Fdocumentation%2Fexamples%2Fcomponents%2Famp-ima-video&format=websites&_gl=1x3blfa_ga*YW1wLVh6RmlUWWlTOV91c0ZaV0QzUWZyQ0E.&mode=Responsive

Relevant Logs

No response

Browser(s) Affected

Chrome

OS(s) Affected

No response

Device(s) Affected

No response

AMP Version Affected

No response