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Screamer PCIe Squirrel for 159 Euro (w/o tax) using Xilinx Artix XC7A35T (according photo). But it has only one high-speed external interface: USB 3.1 Gen 1.

https://shop.lambdaconcept.com/home/50-screamer-pcie-squirre...

Litefury, Xilinx Artix FPGA kit in "NVMe SSD" form factor (2280 Key M) for 102 Euro using Xilinx XC7A100T. It has only few external high-speed LVDS I/O.

https://rhsresearch.com/collections/rhs-public/products/lite...

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The Litefury/Nitefury/Acorn design has enough I/O for an HDMI output. I've designed a little board with a buffer:

https://github.com/mng2/AcornHDMI

Even with the fastest speed grade Artix, 1080p output is technically out of spec, but it seems to work OK.

As you might guess I had/have my own ambitions of making a video card. The software side has been a source of dread for me, but with OP's tutorials I may have enough guidance to get back to it.

The screamer looks interesting, using Displayport Alt mode could work!

The ULX4M boards are not available yet but seem to support both PCIe as well as digital video:

https://kitspace.org/boards/github.com/intergalaktik/ulx4m/

Done by the same team who did the ULX3S.

Actually not, it's wired via a FT601. However, that's not saying it can't be useful.

E.g. you could make it behave like a UVC-type USB3 webcam for the video output.

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