A:AnswerThe best way to test is to use the built in YouTube app and search for 4K content. Watch some nature content or maybe a music video.
I feel this TV provides a pleasing picture. (with the exception of live 4k content) If watching live content there is not much 4k to choose from and this TV has a refresh rate of 60 MHz whereas 120 would really add to a stellar live 4k viewing experience.
A:AnswerYes that call bleading screen led or bleading led light is common in lcd led TV's. You can't worried about that is normal in some led tv's incluid Sony brand.