text: Title: Normal users are not allowed to upload videos but admins can
  Body: Normal users are not allowed to upload videos but admins can upload videos.
  
  ## Steps to Reproduce
  
  1. Login as a normal user (without admin privileges)
  2. Try to edit an exercise and add a new video, :fearful:  there is no add video button.
  
  **Expected results:**
  
  If ALLOW_UPLOAD_VIDEOS is enabled then all users should be able to upload videos.
  