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MOOV Atom Position Detector

Upload your video ad to check if the MOOV atom is optimized for immediate playback.

Collect 24+ data points and validate against IAB ad guidelines

Go ahead, just
drop your ad !
HTML5 Zip
Ad Tag
VAST
Video
Image
Audio
smart_display settings_system_daydream panorama
Drop your video ads here
MP4, WebM, MOV, AVI, MPG, 3GP

MOOV Atom Location

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 do we test it?

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. For the video to start playing virtually immediately, the MOOV atom has to be placed at the beginning of the file.