B_111.mp4 -

: Tells you the quality and smoothness of the video.

: Many smart cameras (such as Arlo ) use alphanumeric strings for saved clips. b_111.mp4

To understand what "b_111.mp4" actually contains without watching it, you can extract its technical summary (metadata). Tools like mp4info can provide a textual report including: : Tells you the quality and smoothness of the video