There were some comments about decreased quality in comparison with official 30 FPS. You might want to check that, given you "replaced" it.
I used
this post, but doublechecked with artists archive, everything is fine
It might be on artist's end tho, he uses pretty low bitrate for 4k in general, it needs like 60-80k, not 30...
And with Cammy vid, you need even more for rain
Pewposterous does this perfectly, every 4k vid - 75-85k bitrate
Someone need to point it out to Nagoon, bcs those vids could look even better