Following is a transcript of the video. Narrator: In the "Black Mirror" episode "San Junipero," Yorkie and Kelly meet and fall in love in a virtual afterlife. And in this world, the possibilities are ...

As long as people have been alive, they've wanted to stay alive. But unlike finding the fountain of youth or becoming a vampire, uploading your brain to a computer might actually be possible.

NARRATOR: With computer users around the world sending millions of suspicious pieces of malware to Symantec's server farm, Eric and Liam get to examine a huge variety. But nearly all of them have one ...