so according to you guys this should be a better build:
ASRock A320M Pro4 AMD Socket AM4 Motherboard £56.86
AMD Ryzen 5 1600 3.2GHz 6 Core (Socket AM4) CPU £83.90
CiT 1016 Case - Black 550W PSU included £28.64
GeIL EVO X II 16GB (1x 16GB) 2666MHz DDR4 RAM £54.94
Maxtor By Seagate Z1 480GB 2.5" SATA III SSD £46.60
LG 22MK400H 21.5" Full HD LED Gaming Monitor £72.01
and i have a Radeon HD 6670 i know it's very old but apparently it's essential for the system as according to my understanding the ryzen5 1600 doesn't support onboard graphics!
total £342.95
now would you say that's better than the Xeon build for video editing?
The Xeon is Ivy Bridge based,so it has lower IPC than a Ryzen 1600 or Ryzen 1600AF. It also runs at a lower clockspeed too. Its a slower CPU. Ivy Bridge only supports AVX,but Ryzen also supports AVX2 and FMA3.
Look for the Ryzen 5 1600 AF,it is based on Zen+ so is quicker.
I had an Ivy Bridge based Xeon E3 1230 V2,and it was slower in single threaded tasks than my Ryzen 5 2600.
Also those HEDT Xeons lack integrated graphics too.
There is also another problem with buying those old Ivy Bridge systems - they are probably upto 6 years old now,and that means failures are increasingly possible.
Edit!!
Regarding the base system:
Ryzen 5 1600 AF(underclocked Ryzen 5 2600) ~ £86
Patriot Viper Steel 3200MHZ 16GB dual channel kit ~£69
ASRock B450M Pro4-F ~ £62
CWT 500W 80+ PSU ~ £30
Maxtor Z1 480GB ~£46
AvP X6 Gaming Case - White ~£20
From another retailer that came to around £313. Some of the cheaper 3000MHZ kits were out of stock,and if you went for a cheaper ASRock B450M-HDV motherboard,it will be under £300,but I think it is better spending the extra £20. Case is basic but has a top mounted fan mount too - you could probably shop around for a better case. It might be worth adding some extra case fans too.
The CWT PSU is a CWT GPT series PSU,ie,the same platform used for a lot of branded cheap PSUs - not the highest end PSU in the world,but it will have all the basic protections.A Ryzen 5 1600 AF and an HD6670 shouldn't be drawing much power. For another £10 more you could get a better PSU. An Antec NeoECO Classic 550W would be just under £40,for example.
You can get a 21.5" monitor for under £70 with DVI and VGA inputs now.