Complex sentence: HEVC is said to improve video quality, double the data compression ratio compared to H.264/MPEG-4 AVC, and can support 8K UHD and resolutions up to 8192 × 4320.
Split into simpler sentences: HEVC is said to improve video quality and to double the data compression ratio compared to H.264/MPEG-4 AVC. It can support 8K UHD and resolutions up to 8192 × 4320.