I didn't see it but this is my analysis:
It is a special crafted message that has the hidden meaning that something is coming but masqueraded as a message that nothing is there.
Title: Time's getting tight
Suggesting that the end is nigh.
Rational thought suggests we should see even a little something by now.
Again suggesting that something there us something out there.
Look at the skies, Chicken Little. See anything?
Again suggesting to look at the skies and acts scared.
Given the fact that we're tracking objects that are too small to be life threatening for the planet,
Suggesting that we are tracking objects
what else might be up there?
Initiating imagination to imagine all other possible doom scenarios.
Sleep easy!
Trying to masquerade the original message that doom is nigh.