[HELP] Interlacing or another problem?

[Selur]

That video was once interlaced, but then it was resized without taking into account that is was interlaced and then saved as progressive video. That video is messed up, only way to salvage it
Usual approach would be to: lower the resolution of the height till the lines are gone.
For example, try:

• loading source
  
• enabling Crop/Resize->Base->Resize
  
• enable "Filtering->Vapoursynth->Misc->Script->Lower res. before resize"
  
• enable "Filtering->Vapoursynth->Misc->Script->Lower res. before resize->height
  
• set the factor in "Filtering->Vapoursynth->Misc->Script->Lower res. before resize" to 2.
  
• check the Vapoursynth Preview to see the effect.
  

Cu Selur