Status bar wont go away while watchin videos on chrome or other browsers

[Android Central Question]

Just now i found out when i started to watch video on my browser(on android) my status thing that shows how much battery i have and shows the time wont go away. And the browser does not say tje usual thing(pull down to exit full screen). I have huawe P smart. Bought it two days ago if some1 can help me this is not a big problem just annoying.