Background Music in YouTube Video. Driving me nuts!!

Hi,

Does anyone recognise the background audio in this vid (ignoring the silly message)

https://www.youtube.com/watch?v=sncGf81pUpk

I've tried inverting audio to extract it, shazam, tunifier, gsound and many other ways to no avail (

Think it's from a video game / movie soundtrack.

Thanks in advance!

Someone mentioned Assassin's Creed in the comments. It sounds like the last song here.