and also which flavour of the

and also which flavour of the formats Jack mentioned. When I have a finished project in Premiere, the options I have for exporting that file are huge. 1080 in 60fps can have HUGE file sizes, I’d guess you chose a more economical preset and threw away much of your quality. Lots of people complain about Vimeo and Youtube, who process their material, making it worse still.

What format did you end up with and at what specification. They all have high to low bitrates and various compression systems.