Tag <amp-video-iframe> not works on Safari and Chrome in iOS (version 12.3 or higher)

[efrensalado]

Description

I am trying to implement amp-video-iframe like the example in the AMP documentation, on Android (Chrome) the example works correctly, but, on devices running iOS 12.3 and above, when the example is loaded, the video tries to load the resource, but it doesn't play the src video (as it can't be loaded) and the console shows some errors related to the amp-iframe.js file

Related issue: issue closed

Reproduction Steps

Example in official documentation
Open in iOS (Chrome or Safari)

In debug mode, the file amp-iframe.o.1.mjs in the line 690, the code that is trying to set the attribute sandbox, is setting the value allow-presentation

Relevant Logs

Error while parsing the 'sandbox' attribute: 'allow-presentation' is an invalid sandbox flag.
amp-iframe.js:826
[Error] Not allowed to load local resource: blob://nullhttps//amp.dev/ww.mjs.map
[Error] Not allowed to request resource
[Error] Cannot load blob://nullhttps//amp.dev/ww.mjs.map due to access control checks.
[Error] Blocked a frame with origin "https://preview.amp.dev" from accessing a frame with origin "https://amp.dev". Protocols, domains, and ports must match.
	(anonymous function) (amp-intersection-observer-polyfill-0.1.js:2:6019)
	(anonymous function) (amp-intersection-observer-polyfill-0.1.js:2:6058)
	(anonymous function) (amp-intersection-observer-polyfill-0.1.js:2:14502)
	(anonymous function) (amp-intersection-observer-polyfill-0.1.js:2:5171)
	b (amp-intersection-observer-polyfill-0.1.js:2:5527)
	g (amp-intersection-observer-polyfill-0.1.js:2:4643)
	(función anónima) (amp-intersection-observer-polyfill-0.1.js:2:15405)
	f (amp-intersection-observer-polyfill-0.1.js:2:15411)
	(anonymous function) (v0.js:2:259520)
	(anonymous function) (v0.js:2:276140)

Browser(s) Affected

Chrome, Safari

OS(s) Affected

iOS

Device(s) Affected

iPhone, iPad

AMP Version Affected

2311212202000

[erwinmombay]

@powerivq would you mind triaging this?

[powerivq]

Tested https://preview.amp.dev/documentation/examples/components/amp-video-iframe#amp=1 on ios 17 (but no repro on safari desktop) and was not able to have the video played. Bumping priority up since this appears to affect a large audience.