They state: "While the Raspberry Pi 5 is fully capable of smooth 4K playback, Raspberry Pi 4 will not be able to play 4K content due to hardware limitations."<p>This likely depends on the codec. The Pi 4’s BCM2711 SoC, unlike the BCM2712 in the Pi 5, has hardware support for H.265 (HEVC) up to 4Kp60. However, the Pi 5 can still support H.265 (HEVC) up to 4Kp60 through software-based decoding, thanks to its more powerful CPU and GPU.