MOOV Atom Position Detector
Scan your Video to check if the MOOV atom is optimized for immediate playback.
What is it?
The MP4 format consists of atoms (packets of data), that are arranged in a particular order. The MOOV atom acts like a table of contents for the video.
Why is it important?
In order for the video to start playing, the MOOV atom has to be read first. If that atom is located at the end of the file, the whole file has to be downloaded before playback can begin. On slow networks, users may have to wait a couple of seconds depending on the size of the video. For the video to start playing immediately, the MOOV atom has to be placed at the beginning of the file.