How can I make the video in fullscreen be in the background?

Question

JavaScript

We are trying to make a video player for android. We do it with cordova. Compiling to apk. Everything works except the player. The video opens, but on top of everything. Our task is to display information at the top of the video - a bar, play and pause buttons, etc.
Video without fullscreen is displayed in poor quality, pixelated. And in fullscreen it is impossible to attach additional information over the video.
How can I make the video in fullscreen be in the background? What plugin can you look for?