Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
The previously reported video upload issue was restricted to organizational accounts (like from a school or employer) whereas it appears your issue is happening with a personal account. With personal accounts, videos are stored on your personal OneDrive account so the issue is likely that you are running out of space in your account. Please try to upload the video directly to OneDrive to see if you get a different error there.
Jason