How to rem

so im trying to embed a video from my google drive. and get this iframe code : <iframe src=”https://drive.google.com/file/d/0B6oSUS8XJZPXXzdvdGstcmVEV3c/preview&#8221; width=”640″ height=”480″></iframe>

you can view it here : http://keepitalive.ga/test-page/
as you can see, when a viewer starts to play the video, there is a small pop-out black square link at the top right of the video. the link leads to my google drive file. my main concern is that i dont want people to share the video just by share the google drive link. i need them to view it through my site.
the question is, can i remove or hide this pop-out squre link ? or is there a code to manipulate the iframe code to disable it ?

I know that there is another option to share video like using plugin. but most of them doesnt support google drive.
Thanks for your time.