Time travel? (Fallout 4)

I came across an entertaining video on the net:
Spoiler
In it, the author analyzes the first trailer, points to a character similar to the main character. In the moment where people run to the shelter, he is standing at the fence, but the most interesting thing is that a second before the transition to the next scene, he simply disappears, dissolving into thin air. Maybe this is of course just a bug that got into the trailer. But what if in this way the developers hint at the presence of time travel in the game?
After all, if you remember, then in the second part of the game, traveling through the wasteland, the Chosen One could stumble upon the location "Guardian of Eternity", in the center of which there was a large stone ring. After passing through it, the main character got to the 3rd level of shelter 13, only 80 years ago, and the only goal was to break the water filter. The first game actually began with Vault 13's water filter breaking and the Vault Dweller being told to go outside and find a replacement.
Given this, and in addition, the wild fantasy of Bethesda, I dare to suggest that in the new game, time travel is quite the place to be. What do you think about this?