You didn't watch/read any of it then did you?
Did you?
As people have pointed out:
1. The 'Griffball' mode, Uplink has been in the series since Advanced Warfare.
2. The video says: "Infinite Warfare", when one of the examples given are from Black Ops 3 (That should tell you how much they researched).
3. On the topic of the Rocket Launcher, have you played Doom? The one in Doom 2016 looks nearly identical and as another person posted in the thread, there is real life RPGs that look similar.
4. The robot that you can get from the MP score streak, if you look at the design, it's basically a bigger version of the Synaptic RIG in the multiplayer. Hardly that they looked at Halo for that when it already matches one of their own designs.
5. The Ring station has been around for far longer than Halo has existed and there is a real life science for them. The comparison is weak as the maps themselves look nothing alike.
6. The Pelican design is hardly original itself, having borrowed it's design from Aliens. Not to mention from another post, the Quinjet from Avengers looks like it. It's a realistic design of a drop ship. As they designed the ships and vehicles based off of their interactions with NASA and the military, they most likely designed it off of that.
They're all an evolution of this:
Except the ones in Halo, Aliens, COD, need to actually work in space.