AA Understanding the a5_xb_...

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MP4 (Source) 1280 x 720 17.0 MB
MP4 (360p) 640 x 360 12.47 MB
MP4 (480p) 854 x 480 16.56 MB
MP4 (720p) 1280 x 720 19.84 MB
3GP 320 x 180 8.24 MB