Use bytesformat instead

tubesync/sync/templates/sync/media-item.html

@@ -113,7 +113,7 @@
         </td>                                                                   </tr>
       <tr title="Size of the file on disk">
         <td class="hide-on-small-only">File size</td>
-        <td><span class="hide-on-med-and-up">File size<br></span><strong>{{ media.downloaded_filesize|filesizeformat|fixB }}</strong></td>
+        <td><span class="hide-on-med-and-up">File size<br></span><strong>{{ media.downloaded_filesize|bytesformat }}</strong></td>
       </tr>
       <tr title="Codecs used in the downloaded file">
         <td class="hide-on-small-only">Downloaded codecs</td>