@apsolut
We fixed the issue by placing the iframe link in another ACF. We did a lot of debugging with our hosting provider and it is because of the API requests you are doing to YoutTube.
The way we loaded video’s on the front-end did to many requests getting the YouTube thumbnail. Everytime a visitor visits that page there was a request to youtube getting the thumbnail of the video, that is why we were blocked.
Maybe this wil help you solving your problem? How do you load the video’s in the Front-end?
Maybe you can post some code?
