z-index video problem in Brightsign (HTML5 canvas)

Hi!

I have a problem with videos z-index playing in a Brightsign. I made an interactive with a video background and an overlay with a menu. By clicking on each option, you start another video with images and texts, but you can't interact because the first video in the background is over everything.

I tried with "canvas.style.zIndex = "1";" I found it in some forum here, and it works on browser, but not in Brightsign. I read its documentation and you have to set the z-index in the hwz property inside the <video> tag (HTML) so that a video respects the order of the layers, but with Animate, the videos are not in <video> tags, so it's not possible to edit the HTML file after publishing... 

Anyone with this problem?

Thank you in advance!