Get time in seconds from iFrame mp4 Video?

Hey guys! In my project I have an layout that plays an mp4 video from a iFrame.

I need to check when the video ends playing so I can move the game forward to the next layout.

I can not make any alterations server-side...

Does anyone know how could I access the time in seconds of the video being played from the iFrame? It would be awesome! I've been searching a lot, but didn't found anything.

Thank you!!

[DOUBLE POST, sorry]

Well, I didn't figured out how to access the data from the iFrame... But I did a workaround without using the iFrame Object.

For anyone interested (sorry if I get any terms wrongly, I use Construct in portuguese):

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-Using AJAX, BinaryData and Video game objects.

-On Start of Layout, set AJAX binary response to BinaryData Game Object.

-Still on Start of Layout, request via AJAX the URL "https://link.com/video.mp4" with the tag "videotest" or anything else.

-AJAX On "videotest" completed, set Video source (H.264) to BinaryData.GetURL. Don't know if it works using WebM or Ogg Theora, but it probably does)

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This will make the video play after the time it takes to download (you can see if it's downloading using the Video On Progress event).

Doing this way I can use On Video Ended to trigger the action to change the Layout.

See y'all!