我有一个视频iframe，当点击一个按钮时会扩展。这包含在具有100vh高度（全屏）的页面的标题内。当视频扩展时，它会将标题中的其余内容向上推，以便使所有内容都在标题中垂直居中。相反，我想增加头部div的高度超过100vh到100vh加上视频高度。但是，到目前为止，我的代码不起作用。

$(document).ready(function(){
    $(".video" ).click(function() {    
        $(".header").height("+=315");
        document.getElementById("video__player").style.maxHeight = "50vw";
        
        document.getElementById("video-btn").style.display = "none";      
    });
});

.header {height: 100vh; width: 100vw;}

.header__content {height: calc(100vh); width: 100%; display: flex; display: -webkit-flex;}
.header__content--container {margin: auto; display: flex; display: -webkit-flex; flex-direction: column; -webkit-flex-direction: column;}
.video__container {text-align: center;}
.video {color: gray; width: 100%; height: auto;}
.play-btn {width: 20px; height: 20px; vertical-align: middle;}
.video__player {overflow: hidden; width: 300px; max-height: 0px; transition: max-height 0.5s ease-in-out; -webkit-transition: max-height 0.5s ease-in-out; margin: auto;}

<div class="header" id="header">
                
                <div class="header__menu">
                    <div class="header__menu--left">
                        <div class="logo">
                        </div>
                    </div>
                    <div class="header__menu--right">
                        <div class="phone">
                        </div>
                            <h8 class="strong" style="margin: auto;">Get your quote</h6>
                        </a>
                        <div class="language">
                            <h9 class="clickable strong" style="color: #5CBDE1;">FR</h9>
                        </div>
                    </div>
                </div>
                
                <div class="header__content">
                    <div class="header__content--container animatedParent animateOnce">
                        <br><br>
                        <div class="quote__wrapper header__quote--wrapper">
                            
                                <h8 class="strong" style="margin: auto;">Get your quote</h6>
                            </a>
                        </div>
                        <br><br>
                        <div class="video__container animated fadeInDownShort slow">
                        </div>
                    </div>
                </div>
                
            </div>