[HELP] Resize doesn't seem to be working

[Selur]

Got the file, like I suspected the pixel aspect ration is simply wrong.

When reencoding, setting:
"Crop/Resize->Pixel Aspect Ratio (PAR)->Input PAR" to "8x9" you get what I would assume to be the right aspect ratio.
No resizing needed. (You can still crop and resize if you want, setting the PAR as mentioned above should keep the aspect ratio fine.)
When remuxing (Base->Processing->Video->passthrough), enabling 'Muxing->Overwrite->Pixel aspect ratio' to '8x9' should fix the issue.
(Attached a remuxed version where I just changed the PAR in the container.)

I also suspect the clip is telecined (can't say for sure from the intro).
Thus you probably might want to try:

1. enable 'Filtering-(De-)Interlace/Telecine->Deinterlace/Telecine Settings->Overwrite input scan type to'
   
2. setting 'Filtering-(De-)Interlace/Telecine->Deinterlace/Telecine Settings->Overwrite input scan type to' to 'telecine'
   

Cu Selur

Ps.: Old by probably a good start to get some understanding in artifacts&co: https://www.aquilinestudios.org/avsfilters/index.html