original -
https://www.nicovideo.jp/watch/sm6304906 carefully upscaled video with carefully adjusted colors, it turned out quite great considering the base quality which was pretty poor(the only visible artifacts is due to base quality which also had them), another downside is that the sound became less loud here :( , not sure what's the case since on Desktop of the PC it sounds just as loud as the original, but once it's uploaded to niconico/youtube it's just sounds like this.., i also uploaded this upscaled version to youtube a month ago
https://www.youtube.com/watch?v=TlRVIFu-lbI < 1440p here
please understand that this was done purely for fun(aka i understand that it will not have any views), my friend asked me to upscale it as a joke back then, but i actually done it lol, to his surprise