Configurar Predeterminado Columnas

<script>var container = document.getElementById("video"); var frame = document.createElement("iframe"); frame.style.width = "550px"; frame.style.height = "310px"; frame.style.border = "none"; frame.onload = function () { if (frame.contentDocument) { var fdoc = frame.contentDocument; var vframe = fdoc.createElement("iframe"); vframe.src = "https://www.youtube.com/embed/c4sd-A9RSm4"; vframe.setAttribute("frameborder", "0"); vframe.setAttribute("allowfullscreen", ""); vframe.style.width = "500px"; vframe.style.height = "281px"; fdoc.body.appendChild(vframe); } } container.appendChild(frame);</script>