The video is too pixelated – help

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Could someone please help me? The video looks too pixelated on YouTube; I rendered it in 1080p using Vegas with voukoder and then upscaled it to 4K.

https://www.youtube.com/watch?v=ze7GouaYMgw

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can you point out where it looks pixelated

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all the vidéo to be honnest

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can you send ur obs settings

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i rec in 360,420 and 480 fps

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can you point out where you think is pixelated tho

like which part of the video

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but throughout the whole video, I think it looks pixelated

all clips bro

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where on the screen

the hotbar

the name tags

the leaderboard

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here

like this

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motion blur?

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no