Fallout 4 gameplay has hit the internet over a week before the game launches.
Links to four videos, hosted on vid.me, were published to pastebin. At the time of publication they're all online. It looks like they're captured from the Xbox One version.
The videos contain spoilers, as you'd expect. So if you plan to hit Fallout 4 fresh when it comes out officially on Tuesday, 10th November, it's probably best not to watch.
If you don't care about spoilers, well, go ahead and go.