If you have an original .arf version of this file that won't play, you can use the Webex Recording Converter to turn it into a standard MP4.
The "AR" prefix often refers to Advanced Recording Format (.arf) used by Cisco Webex. Since yours is an MP4 , it has likely already been converted from its original meeting format to be playable on standard devices. AR 00103b mp4
Most AR platforms recommend avoiding full-frame pure black at the start to prevent "blank" triggers. How to Manage the File If you have an original
If this is an asset intended for use in an Augmented Reality environment, it typically follows these strict requirements to ensure smooth playback: H.264 video with LC-AAC audio. Most AR platforms recommend avoiding full-frame pure black
Many security systems and dashcams use sequential alphanumeric naming (like AR 00101, AR 00102) for exported MP4 clips. Technical Specifications for "AR" MP4s