load previews correctly with fetch

src/css/Preview.css

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+.previewtitle {
+    height: 10%;
+    color: white;
+    text-align: center;
+}
+
+.previewpic {
+    height: 80%;
+}
+
+.previewimage{
+    width:100%;
+    height:100%;
+}
+
+.videopreview {
+    height: 300px;
+    width: 30%;
+    float: left;
+    margin: 1%;
+    background-color: #7F7F7F;
+    cursor: pointer;
+    opacity: 0.9;
+    border: 10px;
+    border-radius: 20px;
+}
+
+.videopreview:hover {
+    opacity: 1;
+    transition: opacity 0.5s;
+}

src/css/index.css

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+body {
+    margin: 0;
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+    font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}

src/css/video.css

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+.hideit {
+    display: none;
+}
+
+.closebutton {
+    color: white;
+    height: 35px;
+    width: 90px;
+    margin-right: 80px;
+    float: right;
+    background-color: #FF0000;
+    cursor: pointer;
+}
+
+.myvideo {
+    width: 100%;
+    float: left;
+}
+
+.videoleftbanner{
+    float: left;
+    width: 100%;
+    height: 100%;
+    background-color: #e5e5ff;
+    border-radius: 40px;
+}
+.likefield{
+    margin-top: 15px;
+    margin-left: 15px;
+    margin-right: 15px;
+    height: 30px;
+    background-color: #9e5353;
+    border-radius: 10px;
+    text-align: center;
+    color: white;
+
+}
+
+.previewcontainer {
+    margin-left: 10%;
+    width: 80%;
+    margin-right: 10%;
+}