Solution for running n3DS_view.exe, the driver software for 2DS (old 3DS) made by NON-STANDARD, on Linux devices.
Cute3DSCapture is great but it cannot handle Keity cards, it only works with Loopy cards. WineHQ does not seem feasible either because I don't think there is a way to install the USB driver. When contacted, Non-Standard said they do not plan on releasing a Linux-compatible build of the software. Running some kind of VM seems the only viable solution – thus this guide.
I tested the following on Manjaro Linux (Arch Linux based) with n3DSview_ver701_r6 (Keity_old3dsview from merki.net). _r5 etc. should also work, they simply refer to different revisions but may not include the DirectX setup which you then need to install manually on the Windows guest. Please note that you will need a Windows license, and Audio capture does not work. You can still record