Best way to share video to a friend ? (~1GB)

Have a look at SwissTransfer. Its run by Infomaniak, and supports files up to 50gb. You can password protect transfers and set the maximum amount of times a file can be downloaded.

Alternatively you can go a bit old school and encrypt the files on a pen drive and send by courier. I still do this as I have some family with broadband speeds from 20 years ago.