.rpr-video-source-container {
    display: flex;
    align-items: center;
}
.rpr-video-source-container input.rpr {
    flex: 0 1 100%;
}
.rpr-video-source-container button.rpr {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 30px;
    margin: 0 0 0 5px;
    min-height: 30px;
    padding: 0;
}

@media screen and (max-width: 782px) {
    .rpr-video-source-container button.rpr {
        flex: 0 0 40px;
        margin: 0 0 0 10px;
        min-height: 40px;
    }
}