Bootstrap 4 nav side in not smooth/jerky/glitchy
You needed position: fixed; and height: 100% !important; in .collapsing:
@media (max-width: 576px)
.navbar-collapse.collapsing {
margin-left: 0%;
right: -20%;
transition: all 0.2s ease;
position: fixed;
height: 100% !important;
}
and you need to remove position: absolute; from video-container as it does not appear to do anything.
For your IOS problem, you can specify your css to the device (credit to https://stackoverflow.com/a/47818418/4101210).
@supports (-webkit-touch-callout: none) {
/* CSS specific to iOS devices */
}
@supports not (-webkit-touch-callout: none) {
/* CSS for other than iOS devices */
}
var videoWidth = 1280;
var video = $(".video-container video").attr("srcdesk");
if($(window).width() < 721) {
videoWidth = 720;
video = $(".video-container video").attr("srcmob");
}
$(".video-container video").attr("width", videoWidth).append('<source src="' + video + '" type="video/mp4" >');a:link {
color: #ffffff;
opacity: 60%;
}
a:visited {
color: #ffffff;
opacity: 60%;
}
a:hover {
color: #ffffff;
opacity: 30%;
}
a:active {
color: #ffffff;
opacity: 30%;
}
.video-container {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
height: 100%;
overflow: hidden;
}
.video-container video {
min-width: 100%;
min-height: 100%;
width: auto;
height: auto;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: -2;
}
.logo {
fill: #ffffff;
opacity: 60%;
}
.navbar-toggler {
font-size: 2rem !important;
color: #ffffff !important;
opacity: 60% !important;
border-width: 0px !important;
}
.footer {
position: absolute;
bottom: 0;
width: 98%;
font-size: 13px;
height: 25px;
line-height: 25px;
/*background-color: #f5f5f5;*/
margin-left: 1%;
margin-right: 1%;
color: #ffffff;
opacity: 60%;
text-align: center;
}
.powered{
float: left;
}
.copy{
float: center;
}
.reg{
float: right;
}
@media (max-width: 576px) {
.navbar-collapse {
position: absolute;
top: 0px;
right: 100%;
padding-top: 54px;
padding-left: 15px;
padding-right: 15px;
padding-bottom: 0px;
width: 100%;
transition: all 0.4s ease;
display: block;
height: 100vh;
width: 20%;
z-index: -2;
}
.navbar-collapse.collapsing {
position: fixed;
height: 100% !important;
margin-left: 0%;
right: -20%;
transition: all 0.2s ease;
}
.navbar-collapse.show {
right: 0px;
}
.bg-light-sm {
background-color: #ffffff !important;
opacity: 90%;
}
.navbar-light-sm .navbar-brand {
color: rgba(0, 0, 0, 0.9);
}
.navbar-light-sm .navbar-brand:hover, .navbar-light-sm .navbar-brand:focus {
color: rgba(0, 0, 0, 0.9);
}
.navbar-light-sm .navbar-nav .nav-link {
color: rgba(0, 0, 0, 0.5);
}
.navbar-light-sm .navbar-nav .nav-link:hover, .navbar-light-sm .navbar-nav .nav-link:focus {
color: rgba(0, 0, 0, 0.7);
}
.navbar-light-sm .navbar-nav .nav-link.disabled {
color: rgba(0, 0, 0, 0.3);
}
.navbar-light-sm .navbar-nav .show > .nav-link,
.navbar-light-sm .navbar-nav .active > .nav-link,
.navbar-light-sm .navbar-nav .nav-link.show,
.navbar-light-sm .navbar-nav .nav-link.active {
color: rgba(0, 0, 0, 0.9);
}
.navbar-light-sm .navbar-toggler {
color: rgba(0, 0, 0, 0.5);
border-color: rgba(0, 0, 0, 0.1);
}
.navbar-light-sm .navbar-toggler-icon {
background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.navbar-light-sm .navbar-text {
color: rgba(0, 0, 0, 0.5);
}
.navbar-light-sm .navbar-text a {
color: rgba(0, 0, 0, 0.9);
}
.navbar-light-sm .navbar-text a:hover, .navbar-light-sm .navbar-text a:focus {
color: rgba(0, 0, 0, 0.9);
}
.footer {
font-size: 10px;
}
}<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
<div class="video-container">
<video autoplay loop="true" width="1280" height="720" muted playsinline srcdesk="https://www.corseestrada.com/site/templates/video/video.mp4" srcmob="https://www.corseestrada.com/site/templates/video/video-mobile.mp4"></video>
</div>
<nav class="navbar navbar-expand-sm">
<a class="navbar-brand" href="#">logo</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#menu" aria-controls="menu" aria-expanded="false" aria-label="Toggle navigation">
<i class="fa fa-bars"></i>
</button>
<div class="collapse navbar-collapse justify-content-end navbar-light-sm bg-light-sm" id="menu">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Menu</a>
</li>
<li class="nav-item">
<a class="nav-link">Delivery</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact</a>
</li>
</ul>
</div>
</nav>
<footer class="footer">
</footer>