video in widget onscherp

beste mensen,
op de startpagina van de website wordt een video in mbv een widget geplaatst.
Door – voor mij – onduidelijke reden is deze ineens onscherp afgebeeld. Voorheen was hij wel scherp. De plaatser zegt niets in zijn handelingen ( video plaatsen bij you tube, daarna in de widget van de site) te hebben verandert.
Wie heeft een idee waar te zoeken?
thema: childthems van GridWP
met aangepaste extra css: `.entry-header {display:none;}
.gridwp-grid-post-title {display:none;}
.gridwp-top-social-bar {
background: #f71212;
border-bottom: 3px solid #0000f1;
-webkit-box-shadow: 0 0 40px rgba(0,0,0,.1) inset;
-moz-box-shadow: 0 0 40px rgba(0,0,0,.1) inset;
box-shadow: 0 0 40px rgba(0,0,0,.1) inset;
}
.gridwp-nav-primary {
float: none;
background: #333333;
border-bottom: 3px solid #00ff01;
-webkit-box-shadow: 0 0 40px rgba(0,0,0,.1) inset;
-moz-box-shadow: 0 0 40px rgba(0,0,0,.1) inset;
box-shadow: 0 0 40px rgba(0,0,0,.1) inset;
}
.gridwp-nav-primary-menu a:hover,.gridwp-nav-primary-menu .current-menu-item > a,.gridwp-nav-primary-menu .sub-menu .current-menu-item > a:hover,.gridwp-nav-primary-menu .current_page_item > a,.gridwp-nav-primary-menu .children .current_page_item > a:hover{background:#f71212;color:#ffffff;}

.gridwp-sidebar-widget-areas .widget .gridwp-widget-title{font:normal normal 15px Oswald,Arial,Helvetica,sans-serif;line-height:1;color:#000000;margin:-12px -12px 6px -12px;padding:0;text-transform:uppercase;text-align:center;background:#eeeeee;border-bottom:1px solid #dddddd;overflow:hidden;letter-spacing:-0.2px;}
.gridwp-sidebar-widget-areas .widget .gridwp-widget-title a,.gridwp-sidebar-widget-areas .widget .gridwp-widget-title a:hover{color:#000000;}
.gridwp-sidebar-widget-areas .widget .gridwp-widget-title span{padding:7px 10px;display:block;border:1px solid #8dff04;position:relative;vertical-align:bottom;}
.gridwp-sidebar-widget-areas .widget a{color:#444444;}
.gridwp-sidebar-widget-areas .widget a:hover{color:#666666;}
.gridwp-sidebar-widget-areas .widget a:active{text-decoration:none;}
.gridwp-sidebar-widget-areas .widget ul{margin:0;padding:0;list-style:none;list-style-type:none;}
.gridwp-sidebar-widget-areas .widget ol{margin:0;padding:0 0 0 1.2em;}
.gridwp-sidebar-widget-areas .widget li{margin:0;padding:6px 0px 6px 0px;border-bottom:1px solid #f6f6f6;}
.gridwp-sidebar-widget-areas .widget li li{padding:6px 0 6px 10px;line-height:1.8;}
.gridwp-sidebar-widget-areas .widget li:first-child{}
.gridwp-sidebar-widget-areas .widget li:last-child{padding-bottom:0;border-bottom:none;}
.gridwp-sidebar-widget-areas .widget select{margin:0;width:90%;max-width:90%;border:1px solid #dddddd;}
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, font, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
border: 0;
font-family: inherit;
font-size: 100%;
font-weight: bold;
margin: 0;
outline: 0;
padding: 0;
vertical-align: middle ;
}

`

De pagina waar ik hulp bij nodig heb: [log in om de link te zien]