DVD playback works for me on XP Pro SP3.
Here is the graph info (Red October Standard).
Filter Graph Info:
Filter 'JRiver Audio Renderer'
CLSID: {A4002F8E-510F-442C-8AD3-F9C7B23FB394}
Host:
Input Pin 'In'
Connected to pin 'Output' of filter 'LAV Audio Decoder (auto-configured)'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_IEEE_FLOAT, Format type FORMAT_WaveFormatEx
Filter 'Video Mixing Renderer 9'
CLSID: {51B4ABF3-748F-4E3B-A276-C828330E926A}
Host: c:\windows\system32\quartz.dll
Input Pin 'VMR Input0'
Connected to pin 'Output' of filter 'MPC - MPEG-2 Video Decoder (Gabest)'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Input Pin 'VMR Input1'
Connected to pin 'XForm Out' of filter 'Line 21 Decoder'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_AYUV, Format type FORMAT_VideoInfo
Input Pin 'VMR Input2'
Filter 'Line 21 Decoder'
CLSID: {E4206432-01A1-4BEE-B3E1-3702C8EDC574}
Host: c:\windows\system32\quartz.dll
Input Pin 'XForm In'
Connected to pin '~CC' of filter 'MPC - MPEG-2 Video Decoder (Gabest)'
Major type MEDIATYPE_AUXLine21Data Sub type MEDIASUBTYPE_Line21_GOPPacket, Format type FORMAT_None
Output Pin 'XForm Out'
Connected to pin 'VMR Input1' of filter 'Video Mixing Renderer 9'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_AYUV, Format type FORMAT_VideoInfo
Filter 'LAV Audio Decoder (auto-configured)'
CLSID: {E8E73B6B-4CB3-44A4-BE99-4F7BCB96E491}
Host: C:\Documents and Settings\AB\Application Data\J River\Media Center 16\Plugins\lav\LAVAudio.ax
Input Pin 'Input'
Connected to pin 'AC3' of filter 'DVD Navigator'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DOLBY_AC3, Format type FORMAT_WaveFormatEx
Output Pin 'Output'
Connected to pin 'In' of filter 'JRiver Audio Renderer'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_IEEE_FLOAT, Format type FORMAT_WaveFormatEx
Filter 'MPC - MPEG-2 Video Decoder (Gabest)'
CLSID: {39F498AF-1A09-4275-B193-673B0BA3D478}
Host: C:\Documents and Settings\AB\Application Data\J River\Media Center 16\Plugins\dvd_video_decoder\Mpeg2DecFilter.ax
Input Pin 'Video'
Connected to pin 'Video' of filter 'DVD Navigator'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_MPEG2_VIDEO, Format type FORMAT_MPEG2_VIDEO
Output Pin 'Output'
Connected to pin 'VMR Input0' of filter 'Video Mixing Renderer 9'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Input Pin 'SubPicture'
Connected to pin 'SubPicture' of filter 'DVD Navigator'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DVD_SUBPICTURE, Format type FORMAT_MPEG2_VIDEO
Output Pin '~CC'
Connected to pin 'XForm In' of filter 'Line 21 Decoder'
Major type MEDIATYPE_AUXLine21Data Sub type MEDIASUBTYPE_Line21_GOPPacket, Format type FORMAT_None
Filter 'DVD Navigator'
CLSID: {9B8C4620-2C1A-11D0-8493-00A02438AD48}
Host: c:\windows\system32\qdvd.dll
Output Pin 'Video'
Connected to pin 'Video' of filter 'MPC - MPEG-2 Video Decoder (Gabest)'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_MPEG2_VIDEO, Format type FORMAT_MPEG2_VIDEO
Output Pin 'AC3'
Connected to pin 'Input' of filter 'LAV Audio Decoder (auto-configured)'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DOLBY_AC3, Format type FORMAT_WaveFormatEx
Output Pin 'SubPicture'
Connected to pin 'SubPicture' of filter 'MPC - MPEG-2 Video Decoder (Gabest)'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DVD_SUBPICTURE, Format type FORMAT_MPEG2_VIDEO
Perhaps MC16 has not been able to download the needed codecs on your computer.
Alternatively you could try the merit based video playback option (at least as a test). MC16 should then be able to load the same filters that MC15 uses.