METHOD 1 - Upscale 240p to 2160p - Which method is the best?

[I recommend to watch this video in the 4k resolution and fullscreen, even on a 1080p display.]

00:00 Method 1 / PlayStation and Dreamcast games
00:13 Blood Omen: Legacy of Kain (PlayStation 1 - NTSC) - Introduction part 1
01:08 Blood Omen: Legacy of Kain (PlayStation 1 - NTSC) - Introduction part 2
01:46 Legacy of Kain: Soul Reaver (PlayStation 1 - NTSC) - Credits
02:51 Legacy of Kain: Soul Reaver (Dreamcast - NTSC) - Chronoplast visions
03:21 Legacy of Kain: Soul Reaver (PlayStation 1 - NTSC) - Introduction » It's not the 480p version
05:12 Legacy of Kain: Soul Reaver (PlayStation 1 - NTSC) - Demo

5:44 Super Nintendo games / Tintin : Le Temple du Soleil (Super Nintendo - PAL) - Demos
8:33 Donkey Kong Country 2: Diddy's Kong Quest (Super Nintendo - NTSC) - Gameplay
10:07 Super Castlevania IV [Uncensored (Hack v1.1- Jap traduit en FR)] (Super Nintendo - NTSC) - Introduction
11:28 Super Castlevania IV [Uncensored (Hack v1.1- Jap traduit en FR)] (Super Nintendo - NTSC) - Demo
11:54 Super Metroid (Super Nintendo - NTSC) - Demos
13:43 Donkey Kong Country 2: Diddy's Kong Quest (Super Nintendo - NTSC) - Ending

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I tried some methods to upscale 240p contents to a 2160p resolution.

It's really a resolution that is hard to upscale, because of the low number of pixels.
Just to have an idea, if we compare the difference between the 240p resolution (with a 4:3 AR) and the 2160p, it gives this:

240p: 320 x 240 = 76 800 pixels
2160p: 2880 x 2160 = 6 220 800 pixels

It's 81 times more. Yes, it's enormous!

Another particular detail with this resolution is that it was originally designed to be displayed on CRT TVs, which was done, as lots of you know, with black lines between scanlines (there is often a confusion between both, because the scanlines are actually the parts of the image that are displayed, not the black lines).

And these black scanlines gave this particular look that worked so well and gave the impression of a better resolution too.

So, what is the best way to upscale this type of resolutions?

With these different methods, I tried to do my best, but some things are definitively a question of tastes, so

»» I NEED YOUR HELP ««

to tell me which method do you prefer. Please tell me what is or are your choices in the comments!

You can choose 2 different methods for the PS1/Dreamcast games and the Super Nes games.

THANK YOU VERY MUCH!

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METHOD 1: https://youtu.be/7_eO2q6Apy4

METHOD 2: https://youtu.be/cmYLxGMLBTI

METHOD 3: https://youtu.be/a_18biTcEEY

METHOD 4: https://youtu.be/ZsbTrGXQuak

METHOD 5: https://youtu.be/OtwJvgmDt24

METHOD 6: https://youtu.be/Ubt2Ri43qs0

METHOD 7: https://youtu.be/SJAgobWImek

METHOD 8: https://youtu.be/vPprpRuZwYg

METHOD 9: https://youtu.be/KdX6Mk5Tvr8

METHOD 10: https://youtu.be/BFUlwWbwK6Y

METHOD 11: https://youtu.be/71MShvEkE9c

METHOD 12: https://youtu.be/1yhZhfLI-Zw

METHOD 13: https://youtu.be/v8IpjGoxASc

METHOD 14: https://youtu.be/dp_xFiN2rCQ

METHOD 15: https://youtu.be/jIpYWRH3tGo

METHOD 16: https://youtu.be/urwi3Z2fdd8

METHOD 17: https://youtu.be/BpK40cq0OSk

METHOD 18: https://youtu.be/OaJ7IVi_n9c

METHOD 19: https://youtu.be/4gJCLoiwRIM

FINAL METHOD: https://youtu.be/JONMlz9F1Ek

Playlist: https://youtube.com/playlist?list=PLL_S06Mn5k4lKgTD0bLnDMjE11MwPsgim

Видео METHOD 1 - Upscale 240p to 2160p - Which method is the best? канала TheSuperLumberjack [FR]