The designation refers to the video's vertical resolution (640x360 pixels). While considered "Standard Definition" today, a 360p video encoded with HEVC is highly optimized for low-bandwidth environments or mobile viewing where data conservation is a priority.
: This format allows for significantly smaller file sizes while maintaining similar image fidelity. Resolution and Container AZWMatEstes Hevc 360p mp4
: HEVC uses flexible Coding Tree Units (CTUs) of up to 64x64 pixels, compared to the fixed 16x16 macroblocks of older standards, allowing it to compress data much more effectively. The designation refers to the video's vertical resolution