[YouTube-API] Layers over a video (iframe api)

I am using the iframe interface for Chrome and Firefox (flash disabled) and everything is ok,  the only problem currently is (vs chromeless player using flash) i have problems to
drag and move windows (in my application) over a video that is playing using html5.
Is there any constrain in the iframe api, to avoid any layer could be over the video playing ? say a mouseover procedure or something like that ? i know i can check by myself using the
inspect from chrome, but before working hard i try to know if it is designed to avoid any division over the video playing.

I have no intention to show anything ad or commercial over the video, just my app lets the user move some tool boxes over the videos that are playing.

Thanks for your answer.
quenotacom

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