We’re pretty sure that’s now called USB 3.2 Gen 1×1, and that standard is capable of transfers at up to 5 Gbps.
The build is based on the MS2130, a HD video and audio capture chip that’s compatible with USB 3.2 Gen 1. The design is known as the Yuzuki Loop Out HDMI Capture Card PRO, or YuzukiLOHCC PRO for short. Has provided files for anyone that wishes to build their own HDMI capture card at home.