Not sure whether N2 has fully inherited the 3.14 kernel capabilities. However these SSH commands work on S905X with CE.
echo 1 > osd_reverse
echo 2 > orientation
Video orientation works for most file formats except H265 and VP9. For those you have to set double_write_mode to 1.
To reset the above to normal orientation you have to specify a value of 0 in the corresponding command string.