message: Add fake fallback thumbnail URL for encrypted videos
diff: @@ -132,7 +132,7 @@ export default class MVideoBody extends React.PureComponent<IProps, IState> {
  // enable the play button. Firefox does not seem to care either
  // way, so it's fine to do for all browsers.
  decryptedUrl: `data:${content?.info?.mimetype},`,
  - decryptedThumbnailUrl: thumbnailUrl,
  + decryptedThumbnailUrl: thumbnailUrl || `data:${content?.info?.mimetype},`,
  decryptedBlob: null,
  });
  }
  