Just checking, ffdshow now shows up as the video and audio decoders in Insurgent, right?
Try using the K-Lite Codec Tweak Tool to disable the mpeg2dec filter (or unregister it) if you have it installed, to see if it makes a difference.
(By the way, could you upload another DxDiag? After installing K-Lite a number of new DirectShow filters should show up there)
Here's my latest Test Render:
File: C:\Wing Commander IV\vob\SC_0010A.vob
Filter 0: Video Renderer
Filename: C:\Windows\SysWOW64\quartz.dll
Filter CRC: 846ED5FC
Date: 2011-10-26 | 00:32:11
Filter 1: Default DirectSound Device
Filename: C:\Windows\SysWOW64\quartz.dll
Filter CRC: 846ED5FC
Date: 2011-10-26 | 00:32:11
Filter 2: Microsoft DTV-DVD Video Decoder
Filename: C:\Windows\SysWOW64\msmpeg2vdec.dll
Filter CRC: A51FECEA
Date: 2009-07-13 | 21:15:46
Filter 3: ffdshow Audio Decoder
Filename: C:\Program Files (x86)\K-Lite Codec Pack\ffdshow\ffdshow.ax
Filter CRC: 1F6B0636
Date: 2012-03-22 | 14:00:00
Filter 4: MPEG-2 Demultiplexer
Filename: C:\Windows\SysWOW64\mpg2splt.ax
Filter CRC: 06876B76
Date: 2010-12-23 | 01:50:23
Filter 5: C:\Wing Commander IV\vob\SC_0010A.vob
Filename: C:\Windows\SysWOW64\quartz.dll
Filter CRC: 846ED5FC
Date: 2011-10-26 | 00:32:11
For some reason it's only showing ffdshow for audio....
The K-lite tweak tool is pretty intimidating, I'm not sure exactly what I'm supposed to be looking for.
And I will post another DxDiag as well.