MP4: a technical baseline MP4 is an industry-standard container developed from the ISO/IEC 14496-12 specification. It can encapsulate multiple streams—H.264 or H.265 video, AAC or MP3 audio, timed text for captions, and chapter or metadata tracks—making it versatile for streaming, download, and archival uses. MP4 files offer a good balance between compression efficiency and quality, broad device compatibility (smartphones, tablets, computers, smart TVs), and support for streaming protocols such as HLS and DASH when fragmented appropriately.

: Take advantage of link customization features like password protection and expiration dates when sending video files to others.

To maximize effectiveness, Youtube itself recommends the MP4 video file format with AAC-LC audio Codec and H. 264 video Codec.