Video is an entire gigantic world that I am only starting to get interested in. For now we just want to know the most basic things.
You want a CF express type B card. Sony and Sandisk have cards with suitable speeds. I am now using a SanDisk 128G card labeled "Extreme Pro". The original listing on Amazon calls it a type B. The label says Read 1700 MB/s, Write 1200 MB/s. The price for this is currently $80. For $140 you can get a Sandisk 512G card.
A warning! I have some video (MP4 files) on the card, then shot some still images and tried importing into Lightroom. It didn't work until I deleted the video. So it sounds prudent to have separate cards for video and general shooting.
Consider a cage by Smallrig to hold accessories.
Tom's Digital Photography Info / tom@mmto.org