I'm watching a live stream where a guy is playing Fortnite, and there is some kind of hash or checksum vaguely visible in the top left corner (circled in red):
Here is a close up (sorry it's not the best resolution):
A quick google search for what this is yields me nothing.
I can also remember this code showing up in videos of other people playing Fortnite (for instance in this video). So this seems to be a feature of Fortnite. I don't actually play the game myself, so I've only run into this when watching other people.
I guess this is some kind of security feature? But what exactly is it, and what is it used for?
I've known about games using checksums before, but I can't think of a reason why it would need to be on screen the whole time.