I'll keep my answer short:
Video - Fujifilm is a galaxy ahead. They are pretty much leading the pack ahead of Sony, Canon and everyone else. On a second thought, it might be neck and neck with Panasonic.
Photo - Still better features than Pentax. But full frame Pentax cameras like the K1 which I used to have, can shoot at significantly higher resolutions (...
Speaking for the X-T4 specifically:
It can record video at a maximum bitrate of 400Mb/s (Mega Bit) which equal 50MB/s (Mega Byte).
Have a look at the video rating (V30, V60, V90) of the SD Cards you are considering. The number after the V tells you how fast it will write continuously, it's the guaranteed minimum writing speed in MB.
So if you want to go with ...