From Halopedia, the Halo wiki
Gloucester, United Kingdom
Most recently, the cutscene in Halo Wars 2 featuring Jerome fighting waves of Brutes in the Enduring Conviction to protect Isabel
The cutscene fight between Locke and Chief in Halo 5. It felt like a normal fistfight between two random dudes and not two genetically augmented supersoldiers
I don't know if this would be considered a Halo tidbit, but I can play parts of One Final Effort from Halo 3 on piano.