I think that is not a good system.https://uk.pcpartpicker.com/list/LnGwLJ
This is a pretty nice system. The only problem is that it's not really overclockable unless you upgrade the power supply. You could also wait for Ryzen 3000 and get an equivalent CPU for cheaper.
The only potential issue I see with it is that PSU. While the CXM series are ok 450W is cutting it very close, especially for a system that would be gaming & video editing. Plus with that kind of budget there's no really no reason to grab a cheaper, lower wattage PSU and take the risk of possibly ruining some parts. https://uk.pcpartpicker.com/list/fqVHP3What's wrong with it?