Genki Arcade allows you to connect a HDMI device to your computer via the Genki ShadowCast accessory.
https://www.genkithings.com/products/shadowcast

Bug Fix v1.6.3

1. Press F11 for full screen mode.
2. Black Title Bar
3. Prompt for Video and Screenshot saved location

Bug Fix v1.5

1. Audio input device confusion - Fixed
2. Added colour tuning in secret mode, punch in UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, B, A to enter secret setting mode.
3. Default color saturation and brightness tuned.