To resolve the issue of the YouTube player not showing you will need to clear your browser's cache.


Chrome


  1. On your computer, open Chrome.
  2. At the top right, click More More.
  3. Click More toolsand thenClear browsing data.
  4. At the top, choose a time range. To delete everything, select All time.
  5. Next to "Cookies and other site data" and "Cached images and files," check the boxes.
  6. Click Clear data.


Edge


To clear your browsing data in Microsoft Edge:


  1. Select Settings and more  > Settings  > Privacy, search, and services .
  2. Under Clear browsing data > Clear browsing data now, select Choose what to clear.
  3. Under Time range, choose a time range from the drop-down menu.
  4. Choose the types of browsing data you want to clear (see the table below for descriptions).
  5. For example, you may want to remove browsing history and cookies but keep passwords and form fill data.
  6. Select Clear now.