What's the best way to save poorly deinterlaced video?

[iopq]

I downloaded videos from youtube to cut up some parts

https://www.youtube.com/watch?v=5ktux7FTBlE&list=PLKOFawUskk6b--T-jZZBEfT645pU2_Vgt

From what I can see is they have poor deinterlacing that forms a comb effect

I'm not sure what filter or even what software to use to fix it, so I wasn't able to figure out which forum to stick it into. Can anyone help?

[Emulgator]

South Korea is NTSC region, North Korea is PAL region.
From the content I guess South Korea, so NTSC source.
Maybe butchered before uploading by deinterlacing, but definitely while youtube reencoding.
490x360@29,97fps 356kB/s AVC bitrate starved
654x480@29,97fps 737kB/s AVC bitrate starved
AviSynth is your friend...

[iopq]

The video goes up to 1440p, but the quality is pretty crap because of the comb effect. I believe YouTube automatically butchers interlaced video and nobody really complained. It is from South Korea, I believe since they use hanguk as the name for "Korean" instead of choseonguk

[Emulgator]

Hm, I can only grab these 2 video streams: one 360p, the other 480p.
How do you get 1440p ?

[iopq]

Hm, I can only grab these 2 video streams: one 360p, the other 480p.
How do you get 1440p ?

You're right, each video in the playlist has a different amount of views so they only have it for some of them

https://m.youtube.com/watch?v=kYunDz1IoUA&list=PLKOFawUskk6b--T-jZZBEfT645pU2_Vgt&index=1

The first like 38 have 1440p, the rest have different qualities