why 11th-16th bits

ffmpeg -vsync 0 -i 5EYX_slS.mov -an -f rawvideo -pix_fmt yuv422p16be - | xxd -b -c 2
ffmpeg version git-N-29930-ge60e54c, Copyright (c) 2000-2011 the FFmpeg developers
  built on May 14 2011 19:05:04 with gcc 4.2.1 (Apple Inc. build 5664)
  configuration: --enable-gpl
  libavutil    51.  2. 1 / 51.  2. 1
  libavcodec   53.  5. 0 / 53.  5. 0
  libavformat  53.  0. 3 / 53.  0. 3
  libavdevice  53.  0. 0 / 53.  0. 0
  libavfilter   2.  5. 0 /  2.  5. 0
  libswscale    0. 14. 0 /  0. 14. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x101012400] Unimplemented container channel layout.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x101012400] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel mailing list.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x101012400] Unimplemented container channel layout.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x101012400] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel mailing list.

Seems stream 0 codec frame rate differs from container frame rate: 2997.00 (2997/1) -> 29.97 (2997/100)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '5EYX_slS.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2011-06-14 22:10:35
  Duration: 00:01:26.11, start: -46.379713, bitrate: 1412 kb/s
    Stream #0.0(eng): Video: v210, yuv422p10le, 720x486, 223724 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc
    Metadata:
      creation_time   : 2011-06-14 22:10:35
    Stream #0.1(eng): Audio: pcm_s24be, 48000 Hz, 1 channels, s32, 1152 kb/s
    Metadata:
      creation_time   : 2011-06-14 22:10:35
    Stream #0.2(eng): Audio: pcm_s24be, 48000 Hz, 1 channels, s32, 1152 kb/s
    Metadata:
      creation_time   : 2011-06-14 22:10:35
    Stream #0.3(eng): Data: tmcd / 0x64636D74
    Metadata:
      creation_time   : 2011-06-14 22:10:35
[buffer @ 0x100e050e0] w:720 h:486 pixfmt:yuv422p10le tb:1/1000000 sar:0/1
[ffsink @ 0x100e054c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x100e057e0] w:720 h:486 fmt:yuv422p10le -> w:720 h:486 fmt:yuv422p16be flags:0xa0000004
Output #0, rawvideo, to 'pipe:':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2011-06-14 22:10:35
    encoder         : Lavf53.0.3
    Stream #0.0(eng): Video: rawvideo, yuv422p16be, 720x486, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc
    Metadata:
      creation_time   : 2011-06-14 22:10:35
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
0000000: 00010000 00000100  ..
0000002: 00010000 00000100  ..
0000004: 00010000 01000100  .D
0000006: 00010000 00000100  ..
0000008: 00010001 00000100  ..
000000a: 00100100 01001001  $I
000000c: 00101001 00001010  ).
000000e: 00101011 00001010  +.
0000010: 00101101 01001011  -K
0000012: 00101111 00001011  /.
0000014: 00101111 10001011  /.
0000016: 00110000 10001100  0.
0000018: 00110001 10001100  1.
000001a: 00110001 11001100  1.
000001c: 00110010 11001100  2.
000001e: 00110010 11001100  2.
0000020: 00110011 00001100  3.
0000022: 00110011 11001100  3.
0000024: 00110100 01001101  4M
0000026: 00110100 11001101  4.
0000028: 00111000 10001110  8.
000002a: 00110101 01001101  5M