Play Video one time in a popup

OK,,, I am spinning my wheels, when there’s this awesome braintrust at WPMU. So I will ask the question here…

I want a video to popup in a lightbox when someone comes to the site the first time – not autoplay –

I don’t want someone to chose the video – I want it to pop automatically when you come into the site.. and then with a cookie, not display again so that I don’t bludgeon the web visitor.

When I was a Joomla guy, I had a module for that…. Now I’m lost.

Any suggestions/reccomendations?