You say embedded video AND linked. It is either one or the other. From your post I understand linked (to Google drive) and not embedded at all, correct? That said, video in a iPDF embedded won't work anyway. For the rest it is an access, user rights, webbrowser setting (as well as which browser uis used) etc. question as well, but I would expect the 'Download' on such Google things. As you can not expect such a thing to behave the same in any way on every system and video in pdf is a problem per definition, please abandon this 'interactive pdf' idea, and with video forget it at all.
Instead try Publish Online.
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