I have yet to find anything that will output Y211 ! The format looks very much like the missing YUV 4:2:2 ordering but Y samples are only taken on every second pixel. Think of it as a half width 4:2:2 image and double the width on display.
|Y Sample Period||2||1|
|V Sample Period||4||1|
|U Sample Period||4||1|
Effective bits per pixel : 8
Positive biHeight implies top-down image (top line first)