Who is this trailer meant for? The end consumer? I ask because much if it feels like showing off features implemented in UE4 rather than something that would really interest a gamer. An example of this is unit selection. I think you spend too much time in the demo selecting units and placing structures. That’s a cool thing to have implemented in UE4- but a standard thing in rts games for years now.
I would cut this trailer in half. Show things that make it impressive, or show potential for fun. Don’t show a lot of UI. People don’t get turned on by UI unless it’s a spaceship game. Do show the energy vortex thing, units beating each other up. Show the correlation between the rts mode and the tps mode. How does that work? Why is that cool? Can you show that?
Finally, throw some titles in there “4 player multiplayer!” Give us information about the game. Give a tiny bit of background “in a distant galaxy the war for resources wages on…” Or whatever.