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.
The inclusion of (High Efficiency Video Coding) indicates the video uses the H.265 codec, the successor to the industry-standard H.264. HEVC is designed to deliver high-quality video at approximately half the bit rate of its predecessor. 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