Luck I will need. I'm a very low level tinkerer.
So, in the 09/05 development version of Hybrid, it appears custom AviSynth scripts are completely broken. Entering ANY custom AviSynth script actually cause Hybrid itself to crash.
Faulting application name: Hybrid.exe, version: 2020.9.5.0, time stamp: 0x5f53ce76
Faulting module name: Hybrid.exe, version: 2020.9.5.0, time stamp: 0x5f53ce76
Exception code: 0xc0000005
Fault offset: 0x0000000000ba9f8a
Faulting process id: 0x188c
Faulting application start time: 0x01d683d931c785d6
Faulting application path: C:\Program Files\Hybrid\Hybrid.exe
Faulting module path: C:\Program Files\Hybrid\Hybrid.exe
Report Id: eebcc4f9-efcc-11ea-9f64-0050560b8935
I had left it on regular 32 bit Avisynth.
So I reverted to Hybrid 2020.07.20.1 to try to get AnimeIVTC to work.
AnimeIVTC uses some 32 bit only AviSynth plugins (like LimitedSharpenFasterMod.avs), so it has to run out of C:\Program Files\Hybrid\32bit\avisynthPlugins. So, I copied AnimeIVTC.avs there.
After a lot of trial and error, I finally got the following custom script to work (inserted before "Deinterlace"):
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\LoadDll.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\TIVTC.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\TDeint.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\TMM2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\nnedi3.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\EEDI2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\eedi3.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\yadifmod2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\mvtools2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\RgTools.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\masktools2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\vinverse.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\MedianBlur2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\Average.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\GRunT.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\ReduceFlicker.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\SangNom2.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\Toon-v1.1.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\VariableBlur.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\warpsharp.dll")
LoadPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\aWarpsharpMT.dll")
LoadDLL("C:\Program Files\Hybrid\32bit\avisynthPlugins\libfftw3f-3.dll")
LoadCPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\yadif.dll")
LoadCPlugin("C:\PROGRA~1\Hybrid\32bit\AVISYN~1\ffms2.dll")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\QTGMC.avsi")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\SMDegrain.avsi")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\Zs_RF_Shared.avsi")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\Srestore.avsi")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\LimitedSharpenFasterMod.avs")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\Daa3.avsi")
Import("C:\Program Files\Hybrid\32bit\avisynthPlugins\AnimeIVTC.avsi")
AnimeIVTC(mode=4, omode=1, killcomb=3)
I haven't tried playing with other settings of AnimeIVTC yet.
All files are already present in Hybrid EXCEPT for
Daa3.avsi. I had to to download that to C:\Program Files\Hybrid\32bit\avisynthPlugins\Daa3.avsi. It appears daamod.avs already included in Hybrid is supposed to be better, but it is not backwards compatible with Daa3.avsi. I could not figure out how (of if it is possible) to make AnimeIVTC work with daamod.avs.