FISK – It's a floppy disk fax machine
In 2018, transferring large files over the internet is still not exactly straightforward. Few years ago Skype was excellent for P2P transfers of very large files, but since then they removed this feature, and today Skype's file transfer limits are ridiculously low. Using Dropbox or Google Drive for that requires a pre-paid amount of cloud storage space: you can't really stream anything directly with any well-known widely available layman tool.