240p_400k_244478861.mp4 →

: This indicates the bitrate . The video is encoded at 400 kilobits per second (Kbps), which is consistent with a low-resolution file.

: Use QuickTime Player or the native Photos/Files app to play the video. 240P_400K_244478861.mp4

: This indicates the resolution . It is a low-definition (LD) vertical resolution of 240 pixels, typically used for older mobile devices or very low-bandwidth connections. : This indicates the bitrate