u/Ineed2stopasap

https://www.youtube.com/watch?v=rR415ki_8C8&t=492s

As you can see in the Video, I really wonder whats the Addon for UI(Specifally the numbers) and also, everytime an enemy pops the insi, there's this high pitched sound(about 12:27 from the warrior), I'd also like to know what that addon is called. I don't know if you can tell more from this Video, but every point into a direction is appreciated.

Take care!