They could just torrent the files between themselves. Add a password too and you're good to go.
Or just to piss off Google, she could encrypt the file before sharing it. But that might be too technical for sender, and receiver.
I once tried to send a zip file of a webapp I coded (HTML and JS) through GMail, and it wouldn't let me, because those 2 files are considered harmful, even if inside a zip. So I renamed the file's extension to "itsazip" and it worked...
Maybe she should just change the video file's extension to ".notporn"
There's syncthing but then you're using volunteer's bandwidth. TOR+httpd is the same.