Allow mkv video playback if supported and custom toast opacity increased

domUtils.js

@@ -136,11 +136,11 @@ export function buildFileTableRow(file, folderPath) {
   const safeUploader = escapeHTML(file.uploader || "Unknown");
 
   let previewButton = "";
-  if (/\.(jpg|jpeg|png|gif|bmp|webp|svg|ico|tif|tiff|eps|heic|pdf|mp4|webm|mov|mp3|wav|m4a|ogg|flac|aac|wma|opus)$/i.test(file.name)) {
+  if (/\.(jpg|jpeg|png|gif|bmp|webp|svg|ico|tif|tiff|eps|heic|pdf|mp4|webm|mov|mp3|wav|m4a|ogg|flac|aac|wma|opus|mkv|ogv)$/i.test(file.name)) {
     let previewIcon = "";
     if (/\.(jpg|jpeg|png|gif|bmp|webp|svg|ico|tif|tiff|eps|heic)$/i.test(file.name)) {
       previewIcon = `<i class="material-icons">image</i>`;
-    } else if (/\.(mp4|webm|mov)$/i.test(file.name)) {
+    } else if (/\.(mp4|mkv|webm|mov|ogv)$/i.test(file.name)) {
       previewIcon = `<i class="material-icons">videocam</i>`;
     } else if (/\.pdf$/i.test(file.name)) {
       previewIcon = `<i class="material-icons">picture_as_pdf</i>`;

fileManager.js

@@ -263,7 +263,7 @@ function previewFile(fileUrl, fileName) {
       embed.style.height = "80vh";
       embed.style.border = "none";
       container.appendChild(embed);
-    } else if (/\.(mp4|webm|mov|ogg)$/i.test(fileName)) {
+    } else if (/\.(mp4|mkv|webm|mov|ogv)$/i.test(fileName)) {
       const video = document.createElement("video");
       video.src = fileUrl;
       video.controls = true;

styles.css

@@ -1068,7 +1068,7 @@ body.dark-mode .custom-prev-next-btn:hover:not(:disabled) {
 }
 
 #customToast.show {
-  opacity: 0.7;
+  opacity: 0.9;
 }
 
 .button-wrap {