To upload videos from off-campus networks, please use a VPN service.
Please refer to the following pages to install the software, connect to a VPN, and try uploading the video.

"VPN (SSL-VPN) service"
  https://www.media.hiroshima-u.ac.jp/services/hinet/vpngw/outline

Hirodai moodle Support Site "How to Upload Videos" (link to "Workshop on Hirodai moodle")
  https://support.vle.hiroshima-u.ac.jp/mdl:workshop