diff --git a/src/domain/session/room/timeline/tiles/BaseMediaTile.js b/src/domain/session/room/timeline/tiles/BaseMediaTile.js
index 9cd3222d..ea3812d7 100644
--- a/src/domain/session/room/timeline/tiles/BaseMediaTile.js
+++ b/src/domain/session/room/timeline/tiles/BaseMediaTile.js
@@ -72,7 +72,7 @@ export class BaseMediaTile extends MessageTile {
             const attachment = this._entry.pendingEvent.getAttachment("info.thumbnail_url");
             return attachment && attachment.localPreview.url;
         }
-        if (this.mimeType?.startsWith("image/")) {
+        if (this._isMainResourceImage()) {
             if (this._decryptedFile) {
                 return this._decryptedFile.url;
             } else {
@@ -111,7 +111,6 @@ export class BaseMediaTile extends MessageTile {
         return null;
     }
 
-
     async _loadEncryptedFile(file) {
         const blob = await this._mediaRepository.downloadEncryptedFile(file, true);
         if (this.isDisposed) {
@@ -128,7 +127,7 @@ export class BaseMediaTile extends MessageTile {
             if (thumbnailFile) {
                 this._decryptedThumbnail = await this._loadEncryptedFile(thumbnailFile);
                 this.emitChange("thumbnailUrl");
-            } else if (file && this.mimeType?.startsWith("image/")) { // is the main resource an image? then try that for a thumbnail
+            } else if (file && this._isMainResourceImage()) { // is the main resource an image? then try that for a thumbnail
                 this._decryptedFile = await this._loadEncryptedFile(file);
                 this.emitChange("thumbnailUrl");
             }
@@ -146,4 +145,8 @@ export class BaseMediaTile extends MessageTile {
         // we should not upscale images, so limit scale factor to 1 upwards
         return Math.min(scaleWidthFactor, scaleHeightFactor, 1);
     }
+
+    _isMainResourceImage() {
+        return true; // overwritten in VideoTile
+    }
 }
diff --git a/src/domain/session/room/timeline/tiles/VideoTile.js b/src/domain/session/room/timeline/tiles/VideoTile.js
index 13ed68f9..fbcf26c6 100644
--- a/src/domain/session/room/timeline/tiles/VideoTile.js
+++ b/src/domain/session/room/timeline/tiles/VideoTile.js
@@ -40,4 +40,8 @@ export class VideoTile extends BaseMediaTile {
     get shape() {
         return "video";
     }
+
+    _isMainResourceImage() {
+        return false;
+    }
 }