Learn in the textbookHow Video Works and Its File Formats
DefinitionH.265 is the video coding standard that succeeds H.264, also called HEVC (High Efficiency Video Coding).
ExplanationAt the same picture quality it is said to need only about half the data of H.264, at the cost of heavier computation for compression and playback (decompression). It is used to broadcast and stream 4K and 8K high-resolution video, which carries a lot of data.
AnalogyIt is a newer folding method that takes more effort but packs the same luggage even smaller.
Memory hookThe HE in HEVC stands for High Efficiency.