You don't even need to spin up anything - eg AWS datasync will mirror the remote server for you directly into glacier which can be extremely cheap if you're okay with access-a-file-12-hours-after-you-request-it

I'm not familiar with 'AWS datasync', but isn't the point of Glacier that it's really expensive and slow if you retrieve everything? It sounds like a bad idea for videos he planned to download in order to catalogue them. (He might want to delete them or could safely infer that 'no, neither me nor my siblings will want to watch this on Christmas Day', yes, but he still has to look at them first since he doesn't know what's on them at all.)