: Cameras (especially budget action cams or older digital cameras) often use a naming convention like B0001 , B0002 , etc. If you found this on an SD card, it is likely the first video you recorded after a reset.
b0001.mp4. 南區樹義國民小學｜李緹. 影片展示學生如何使用數位載具與數位學習平台來提升學習效果的影片，同時也呈現學生如何將數位技能應用在日常生活的各種場合。影片中，我們可以看到學生在4年的時間裡，如何從初學者成長為數位高手，並分享他們的心得和感想。 臺中市中小學數位學習推動辦公室 b0001.mp4
: Many users encounter this filename when using video repair tools like untrunc-w on GitHub to fix broken MP4 files from cameras that didn't save correctly. : Cameras (especially budget action cams or older