File info:

Color range                    : Limited
colour_range_Original          : Full
Color primaries                : BT.709
colour_primaries_Original      : BT.601 NTSC
Transfer characteristics       : BT.709
transfer_characteristics_Origi : BT.601
Matrix coefficients            : BT.709
matrix_coefficients_Original   : BT.601
mdhd_Duration                  : 28160
Codec configuration box        : avcC
What a mess :)

But the source is definitely full range and probably BT.601.
VirtualDub sees this through CacheInputDriver as yuvj420p (601:FR).
Vegas sees (incorrectly) as Limited (I have to set Full manually) and probably as BT.709.
How to manually change the color space to BT.601?