checking video file

$ ffmpeg -hide_banner -i sample_recording_v2/eye0.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample_recording_v2/eye0.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.12.100
  Duration: 00:01:20.52, start: 0.000000, bitrate: 8779 kb/s
    Stream #0:0(und): Video: mjpeg (mp4v / 0x7634706D), yuvj422p(pc, bt470bg/unknown/unknown), 192x192, 8773 kb/s, 200 fps, 200 tbr, 12800 tbn, 12800 tbc (default)
    Metadata:
      handler_name    : VideoHandler
At least one output file must be specified

$ ffmpeg -hide_banner -i my-1st-rec/eye0.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'my-1st-rec/eye0.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:00:29.88, start: 0.000000, bitrate: 114 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 400x200, 112 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
At least one output file must be specified