You may or may not know that most Ubisoft games take place in the same universe.
And even though all Far Cry games are just loosely connected, they still are!
These two videos explain it in detail.
But then I thought: How does Far Cry 5 fit in there?
The answer is: All previous games are just video games/movies inside of the Ubisoft universe!
Here is the reason why:
In FC5 you meet Guy Marvel who is currently shooting a Blood Dragon 3 movie and talks about how he made Far Cry games before, there is also the Far Cry Arcade machine.
In addition to that, there are also bobblehead figures of Vaas and Pagan Min.
Why should a company make figures of real a dictator and a pirate leader?