This a fan trailer that was made for the Avengers Flashpoint Paradox.
This was made by Alex Luthor. Check out his synopsis and the fan trailer below.
"For people who say that the trailer is Fake, well, obviously. I didn't make this trailer to fool or scam anyone, it's just a fan trailer. This is just a concept fan trailer for Avengers Flashpoint Paradox Fan film. This was made for fun.
Little information about the story: Scarlet Witch is the reason why this alternate universe thing happens. Captain America and here are the only ones that know that everything is changed. Captain America wakes up in his doppelganger’s body, and he learns that Hydra has won World War 2, and his version of this reality actually helped Hydra win the war and conquer the world. Hydra is now and Empire, and Tony Stark is the emperor.
Wakanda is one of the only places on Earth isn’t part of the Hydra empire, and Black Panther leads his people in a war against Tony and his Hydra army.
Mutants and super powered beings are being hunted by Hydra. Magneto is the leader of the resistance. Wolverine is part of the resistance too, but he was captured. Black Widow is a resistance spy that infiltrated Hydra, she is married to Captain America, and she is on a mission to kill him (the evil version of Capt). Both Spider-Man and Rhodey are part of the resistance and they stole suits and armor from Stark. Hulk is red and he is the Doomsday weapon for Hydra. Bucky is an assassins for Hydra. Loki rules Asgard, while Thor is missing. Ultron is actually something of a Vision in this reality, and he is not evil or good, he is on his own side.
After learning all this, Captain America tries to find Scarlet Witch, who is missing in this new reality. What will happen? Find out in 2017…"