When our time is up
When our lives are done
Will we say we've had our fun?
Will we make our mark this time?
Will we always say we tried?
Standing on the rooftops everybody scream your heart out
Standing on the rooftops everybody scream your heart out
Standing on the rooftops everybody scream your heart out
This is all we got now everybody scream your heart out
All the love I've met
I have no regrets
If it all ends now
I'm set
Will we make our mark this time?
Will we always say we tried?
Standing on the rooftops everybody scream your heart out
Standing on the rooftops everybody scream your heart out
Standing on the rooftops everybody scream your heart out
This is all we got now everybody scream your heart out
Standing on the rooftops, wait until the bomb drops
This is all we got now, scream until your heart stops
Never gonna regret, watching every sunset
Listen to your heart beat, all the love that we felt
Standing on the rooftops, wait until the bomb drops
This is all we got now, scream until your heart stops
Never gonna regret, watching every sunset
Listen to your heart beat, all the love that we felt
Scream your heart out
Scream your heart out
Scream your heart out
Scream your...
Standing on the rooftops everybody scream your heart out
Standing on the rooftops everybody scream your heart out
Standing on the rooftops everybody scream your heart out
This is all we got now everybody scream your...
Well this song's full name id 'Rooftops (A Liberation Broadcast)', so It's actually about not letting anyone oppress you or get you down. When he says 'Standing on the rooftops everybody scream your heart out' he saying that when people try to get you down that you should tell them exactly what you think, and that you should broadcast it to the world from atop a rooftop if you have to. (not literally)
a few people said earlier that it's about making an impact, and i agree to some extent. i think it's more to do with taking the opportunity to do so, since there may not be any more to take.