Hello,
I have the same issue.
My original video is in 4k, 25fps, H.265. However, I have also created alternative versions of it in order to avoid having compatibility issues if I want to upload it somewhere. So I have also created:
a) A 4k, 25 fps, H.264 version.
b) An HD, 25 fps, H.265 version.
c) An HD, 25fps, H.264 version.
The video is 2,11 mins long and file sizes are:
a) 4k, H.265 video - 872 MB
b) 4k, H.264 video - 950 MB
c) HD, H.265 video - 700 MB
d) HD, H.264 video - 671 MB
I have tried to upload all of them directly in Squarespace and unfortunately Squarespace puts all of them through the meat grinder.
Does anyone know a solution to this?