Yes, that is a good build. 1080p won't be a problem, but higher than that will not be possible with an RX570.
Just make sure to get a decent quality PSU, Seasonic S12II, Corsair CXM 450W, EVGA G2,G3...
Ryzen 5 1600x
ASUS Prime B350-PLUS Mobo
MSI Radeon RX 570 GAMING X 4GB
16GB Corsair RAM
1080p will do really good. For just video editing, 1440p or 4k are quite possible, but 1440p or 4k isn't practical or isn't possible with just an RX-570 to play games.
Don't skimp on the PSU, or you'll have to budget replacements way too soon. And a good case is advisable.