Force A Div To Show Up And Overlay Whatever Is In Fullscreen

I have a Chrome extension that inserts a menu into the page, but whenever any flash or html5 video player goes full screen, anything outside of the video player is invisible. Coul

Solution 1:

This is not likely to be possible. The video player fullscreen implementation takes over the entire screen; you do not have a browser window to overlay on anymore.

It's not the same as going fullscreen in your browser, where you still have the normal browser window to work with.

edit: to expand further;

With any video player using Flash, this is absolutely not possible, because you have no chance of any HTML elements to overlay onto; the fullscreen is handled by flash itself, and you can't do anything with that.

With HTML5, from my testing it also seems impossible. I went to this sample page, edited the HTML in the dev tools to try inserting a div inside the video element, but it won't render.

If you had control over the pages, it might be possible to fullscreen a container div instead of the video itself, and then achieve what you want, but since you can't control the pages in question, that likely won't help you at all (unless you wanted to try replacing IDs/etc in-page, but even that wouldn't guarantee success; if the page JS already had handles on the relevant elements, replacing IDs wouldn't update those)

Solution 2:

Unfortunately as @Collin Grady mentioned this is not possible since the browser takes care when you play a fullscreen video.

You can still simulate full screen tho! You could modify the size of the video to adjust to the size of the screen (or whatever size you require). By doing this you still have control on your elements and can show your menu on top of the video.

There is an article in CSS Tricks that could guide you on how to modify the dimensions of a youtube video. The writer of the article wrote a jQuery plugin too called FitVids.JS

By Simulating full screen you could show what you want on top.

I hope this helps