420 is okay for those who saving their storage. tbh 420 is not bad and also consume low storage. For me, It's still depending on the movie/film to watch, if i pretty like that movie I'm gonna go with 720p quality.
720p 10bit kung merun, is enough for me. Laptop screen lang naman merun ako and naka vpn lang pag download ng movie, and ok na din quality neto kaya no need for more, pero kung sa TV ako manonood baka 1080p ako.
Para sakin Boss Admin, 1080p ang sweet spot kasi sure naman akp na lahat ng end devices na gamit natin at atleast naka 1080p screen. Wala rin naman "masyadong" epekto ang isang 4k file kapag pinanuod sa 1080p screen.