.boton_de_videos 
{
    background-color: hsla(200, 50%, 88%, 0.5);     
    color: hsla(0%, 0%, 0%, 1.0);
    border:1px solid #009900;
    cursor: pointer;
    border-radius: 28px;
    padding: 15px 30px;
    text-shadow:0px 1px 0px #aaffaa;          
}
.boton_de_videos:hover, .boton_de_videos:focus
{
    background-color: hsla(0, 100%, 30%, 0.4);
    color: hsla(0%, 0%, 0%, 1.0);     
    text-shadow:0px 1px 0px hsla(0, 100%, 30%, 0.7);         
}
.boton_de_videos:active 
{
    background-color: hsla(0, 100%, 30%, 0.7);  
    color: hsla(100%, 100%, 100%, 1.0);
    text-shadow:0px 1px 0px #ffffff;          
          
}
.contenedor_de_videos
{
    position: relative;
    overflow: hidden;
    height: var(--altoVideo);
    width: 100%;
    margin: 0px;
    padding: 0px;
}
.marco_de_video_responsivo
{
    width: 100%;
    height: inherit;
    overflow: hidden;
    display: flex;
    align-items: stretch;
    flex-wrap: wrap;
}