G114.mp4 ⚡

For small file sizes, use the VerySlow preset and High profile in converters like HandBrake.

It consists of "boxes" (or atoms). The first 8 bytes are a box header (4 bytes for size, 4 bytes for type). g114.mp4

For in-depth technical detail, refer to ISO/IEC 14496-14 (MPEG-4 Part 14) and ISO/IEC 14496-12 (Part 12). Practical Optimization Tools For small file sizes, use the VerySlow preset