Xbox One S Wi-Fi Speed Test 2.4GHz vs 5GHz Which one is Best?

Hi, this video shows a test on a Xbox One S between the 2.4GHz and 5GHz Wi-Fi frequency.
The Xbox One S Console and the BT Home Hub 5 Router in the video support 802.11ac and 5GHz. The service provider is Virginmedia with a 70Mbps Download and 5Mbps Upload.
I test in 4 different locations in the house to see which one performs better in each location.
So does the 5GHz frequency work better when you are nearer the router?
Does the 2.4GHz frequency work better when you are further away from the router?
Most routers (Dual Band Routers)select the best option for you automatically but if you have a 2.4GHz only router would it be worth upgrading? or if it is like my Virginmedia router you can have either 2.4GHz or 5GHz but not both so you have to choose between each frequency.
Hopefully this video will give you a better idea of which frequency to choose.
Many thanks Vince

Видео Xbox One S Wi-Fi Speed Test 2.4GHz vs 5GHz Which one is Best? канала My Mate VINCE