body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f8ff;
}

.container {
    padding: 20px;
}

h1 {
    color: #007bff;
}

#upload-section {
    margin-bottom: 20px;
}

.video-list {
    display: flex;
    flex-wrap: wrap;
}

.video-item {
    margin: 10px;
    width: 200px;
}

.video-item img {
    width: 100%;
}

.banner {
    margin-top: 10px;
    padding: 10px;
    border-radius: 5px;
    display: inline-block;
}

.success {
    background-color: #d4edda;
    color: #155724;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
}