[HELP] how to crop left and right black bars, keep ratio aspect at the same time?

[Selur]

It's simple:
Enable: "Filtering->(De-)Interlace/Telecine->Deinterlace/Telecine Settings->Overwrite input scan type to" and make sure it's set to 'progressive'.
This way Hybrid will assume the source is progressive.
Then open the Vapoursynth Preview and move the slider through your source (specially start and end).
If you see combing artifacts the source is either interlaced, telecined or field shifted and you need to disable "Filtering->(De-)Interlace/Telecine->Deinterlace/Telecine Settings->Overwrite input scan type to" again. (and figure out whether the source is interlaced, telecined or field shifted)
If you see no combing artifacts at all the source is progressive and just flagged as interlaced, so kepping "Filtering->(De-)Interlace/Telecine->Deinterlace/Telecine Settings->Overwrite input scan type to" enabled and set to progressive is the right way to go.

Cu Selur