Typically encoded with H.264/AVC (Advanced Video Coding).
In the context of the Dynamic Adaptive Streaming over HTTP (DASH) protocol, YouTube assigns unique numeric codes to every available quality and codec combination for a video. "133" is the standard identifier for: Container: MP4 (.mp4). 133mp4
MP4 (MPEG-4 Part 14) remains the industry standard for web video due to its high compression efficiency and universal compatibility across devices like smartphones, TVs, and PCs. Formats like 133 (240p) are essential for maintaining playback stability in low-bandwidth environments where higher definitions would cause buffering. Typically encoded with H
For a deeper dive into how the MP4 container functions as the foundation for these streaming formats, watch this overview: What is MP4 File? | MP4 Explained | MPEG-4 Part 14 LearnEveryone YouTube• Apr 15, 2024 MP4 (MPEG-4 Part 14) remains the industry standard
This is a "video-only" DASH stream, meaning it does not contain audio; the audio is stored in a separate stream (like itag 140) and synchronized by the player during playback. Scientific and Academic Contexts
While "133mp4" is widely known in video engineering, the sequence "133" also appears in specialized academic literature related to video data: