No, that's the error message. It's a warning, so it shouldn't directly cause the crash.
You select the debug version of whatever build you're using and run it until the crash. You may even get a different error on crash. Speaking of builds though, what build are you using?

[EDIT] The fact that the mediavps are causing an issue is something we want to find the cause of.
I'm running FS2 Open v3.7.2 and mediavps 3.6.12. I ran the debug for v3.7.2 and this is what I got from the debugger window:
Invalid subobj_num or model_num in subsystem 'enginesupleft' on ship type 'GTD Hades'.
Not linking into ship!
(This warning means that a subsystem was present in the table entry and not present in the model
it should probably be removed from the table or added to the model.)
ntdll.dll! NtWaitForSingleObject + 21 bytes
kernel32.dll! WaitForSingleObjectEx + 67 bytes
kernel32.dll! WaitForSingleObject + 18 bytes
fs2_open_3_7_2-DEBUG.exe! SCP_DumpStack + 354 bytes
fs2_open_3_7_2-DEBUG.exe! Warning + 421 bytes
fs2_open_3_7_2-DEBUG.exe! subsys_set + 314 bytes
fs2_open_3_7_2-DEBUG.exe! ship_set + 604 bytes
fs2_open_3_7_2-DEBUG.exe! ship_create + 1457 bytes
fs2_open_3_7_2-DEBUG.exe! parse_create_object_sub + 77 bytes
fs2_open_3_7_2-DEBUG.exe! parse_create_object + 193 bytes
fs2_open_3_7_2-DEBUG.exe! mission_parse_maybe_create_parse_object + 390 bytes
fs2_open_3_7_2-DEBUG.exe! post_process_ships_wings + 111 bytes
fs2_open_3_7_2-DEBUG.exe! post_process_mission + 69 bytes
fs2_open_3_7_2-DEBUG.exe! parse_mission + 1520 bytes
fs2_open_3_7_2-DEBUG.exe! parse_main + 444 bytes
fs2_open_3_7_2-DEBUG.exe! mission_load + 228 bytes
fs2_open_3_7_2-DEBUG.exe! game_start_mission + 192 bytes
fs2_open_3_7_2-DEBUG.exe! game_enter_state + 511 bytes
fs2_open_3_7_2-DEBUG.exe! gameseq_set_state + 310 bytes
fs2_open_3_7_2-DEBUG.exe! game_process_event + 242 bytes
fs2_open_3_7_2-DEBUG.exe! gameseq_process_events + 152 bytes
fs2_open_3_7_2-DEBUG.exe! game_main + 782 bytes
fs2_open_3_7_2-DEBUG.exe! WinMain + 330 bytes
fs2_open_3_7_2-DEBUG.exe! __tmainCRTStartup + 358 bytes
fs2_open_3_7_2-DEBUG.exe! WinMainCRTStartup + 15 bytes
kernel32.dll! BaseThreadInitThunk + 18 bytes
ntdll.dll! RtlInitializeExceptionChain + 99 bytes
ntdll.dll! RtlInitializeExceptionChain + 54 bytes
I found the fs2_open.log, do you want me to paste all its contents?