Video: In 2247, time travel will be invented. Its only restriction? You can only travel back in time three minutes. It becomes a new safety feature for space travellers called Timedrive. Every ship will be fitted with it as a safety requirement. That's the plot of a great new short film called Exit Log, and while it sounds good in theory, it's a terrible idea in practice.
An exit log refers to the log the ship leaves itself when the Timedrive is activated. It tells you that you jumped, and leaves you set to fix whatever may have doomed your ship.
In Exit Log, we see why having a Timedrive is a terrible idea.