The minimum system requirements for viewing 4K UHD video is a PC with an Intel or AMD CPU equivalent to
Intel Core i7 with 4 cores, running at 2.3GHz.
Takze i5 asi smola, aj ked sa mi to nezda, ze by i5ka nezvladla jedno blbe UHD video.
este mozes skusit - https://www.5kplayer.com/video-music-player/solve-vlc-h265-hevc-4k-playback-problems.htm