I already use a pretty nice plugin for popup galleries that can scroll through all the images on a page, but I want to show a longer video ad that I made, and have some way to show the looping gif preview on the page itself, and for people who want to watch the whole thing, just click a button and have it pop up in a lightbox or something.

Right now I have the video as its own page, which is a little too much for how much I'm showing on that page, compared to the other pages

This is for a portfolio