How can I fix this video format so that it appears in 4k resolution?

[David362683261vkd]

How can I fix this video format so that it appears in 4k resolution?

https://www.youtube.com/watch?v=NqCxSV6rPNA&t=1402s 

[Ann Bens]

Make sure you export as 4K and upload manually.

If you already done this do it again: YT is not flawless.

[David362683261vkd]

it doesn't change much

[Mohammad.Harb]

Make sure the sequence size in the sequence settings is set to 4K size before exporting

[David362683261vkd]

it doesn't change much..

[Ann Bens]

post sequence settings and export settings.